Don't misunderstand me: I would prefer that Jill Stein wins.
In fact, I would prefer to get punched in the face several times if it would prevent Hillary winning.
But that isn't the choice before us.

I'm under no impression that Hillary will be anything other than a terrible president, but so would The Donald.

I personal don't care that Trump is a pig. It makes little impact on his ability to be competent as president.
His intentions to dramatically cut taxes for the wealthy, gut the EPA and Wall Street regulation, while continuing the GWOT and the surveillance state makes him a terrible choice for president.

On the other hand, Hillary would be only marginally better, if that.

In the recent Wikileaks revelations confirming Hillary Clinton’s duplicity, one of the clearest disclosures of her policy plans concerns her intention regarding Social Security. She stated that she would return to the position of the National Commission on Fiscal Responsibility and Reform, charged with producing recommendations for reducing the deficit, i.e. cutting government social spending....
Hillary Clinton’s speeches to the captains of finance strongly imply that she would resume the project of privatizing Social Security. Hers will be a gradual, stealth approach. The opening salvo will be further cuts in benefits and extensions of the full-benefit retirement age. But these alone will not satisfy Wall Street. The privatization plan will be resurrected, first in the form of legislation once again to begin “partial privatization.” In the end, the objective will be to turn the program into a broker’s-fee-for-service plan entirely in the hands of Wall Street. Retired workers will no longer be unqualifiedly entitled to Social Security benefits. Their fortunes will be tied to the vagaries of the stock market and other speculative ventures favored by brokers. And retirees will pay for this “service.” There will be no refunds when the market goes belly-up.

What's more, if Hillary wins in a landslide, then we can expect the worst of both worlds.

The landslide will be a mandate for more permanent war, more favors for Wall Street, more privatization of the public sphere, more of the racist War on Drugs that feeds mass incarceration, more pipelines and fracking, more half-hearted action against climate change.
A landslide will give Ms. Clinton no motivation to repair the Affordable Care Act’s deep defects. She’ll feel no obligation to maintain her campaign-season opposition to the Trans-Pacific Partnership, which she promoted vigorously as Secretary of State.
Ms. Clinton will interpret the landslide as a license to discard the modest populist concessions she made to keep Bernie Sanders’ supporters inside the Democratic Party fold.

Basically, the corrupt neoliberal, warmongering, political insider Hillary Clinton is the embodiment of everything that is wrong with our political system.

So why on Earth would I prefer that Hillary win?
Two reasons.

One reason is that she won't be winning in a landslide.

There’s been a potential breach of Hillary Clinton’s electoral firewall. And it’s come in New Hampshire, a state that we said a couple of weeks ago could be a good indicator of a Donald Trump comeback because of its large number of swing voters...
If Clinton lost New Hampshire but won her other firewall states, each candidate would finish with 269 electoral votes, taking the election to the House of Representatives.

There is no chance of the Dems winning the House, while the Senate appears headed for a 50-50 split. This makes it harder for Hillary to push through her awful agenda, than Trump would have pushing through his awful agenda (with exceptions, of course).

In a related point, there is Hillary's baggage.

If Hillary Clinton wins Tuesday, she’ll head into office under the cloud of two major FBI investigations, including one that’s reportedly “likely” to lead to an indictment....
At a minimum, it all guarantees that Congress will be probing Justice’s conduct — and demanding some sort of special prosecutor take over the case(s) should Clinton win the White House.
Now, even before Election Day, Hillary is facing two more serious probes. Americans already distrust her — and it seems those worries will only grow if she’s elected.

This is a sure recipe for political gridlock, which is the best we can hope for given these two terrible candidates.

The other reason I would prefer that Hillary wins:

The corrupt neoliberal, warmongering, political insider Hillary Clinton is the embodiment of everything that is wrong with our political system

Why is that a reason for me preferring she wins?
Because she is going to fail, and fail badly.
As the symbolic embodiment of everything that is wrong with our political system, it might finally cause Democratic voters to reject fear and embrace change.

Why is "nothing good can come of this" good? Because ridding the nation of its political corruption will require hitting bottom.
Just as an alcoholic or drug addict is incapable of making any truly positive changes until he/she hits absolute bottom, so it is with our tolerance of a corrupt political system that is poisoning the nation, one injection of corrupt cash, collusion and pay-to-play at a time.

I recently cross-posted Where is our Ferdinand Pecora?
The story was instructive that even as late as 1932, there was no real push for reforming Wall Street.
The status-quo had successfully defended the existing system until then.
Glass-Steagall didn't happen until the entire banking system had collapsed and had been discredited.

There is no chance of reforming our broken political system until it is similarly discredited.
TPTB will fight real reforms tooth-and-nail.

Republican voters have embraced real change.
Independent voters have embraced real change.
Non-voters have embraced real change.

Democratic voters voters have NOT embraced real change.

Sure, Bernie may have won 23 states, but most of those states were caucus states or open primaries.
Most Democratic voters are still paralyzed with fear, and they are holding us all back.

We need to be united in purpose as a people. We need to be so disgusted with the political system that the ruling elite can't drown us out. We need TPTB is actually fear us more than fearing the loss of a little of their power.
Only then will real change happen.

A majority of Democratic voters, as typified by TOP, are more interested in virtue signaling, cheering the team uniform, and trembling in fear of the Hitler-Of-The-Week.
More than anything, Democrats support check-box-identity-politics, and Hillary embodies this.

So will President Hillary discredit the current political system?
I believe she will.

First of all, Hillary is being set up to fail by the economic business cycle.
As I showed here, here, here, and here, we will be in a recession sooner rather than later, and the working class is already living on the edge.

Also, Hillary's military adventure is Syria will be a disaster (and here).

Hillary, the symbolic embodiment of everything that is wrong with our political system, is already distrusted and disliked.
When the economy sinks and her signature war ends in defeat, she will be discredited, as will the establishment that forced her on us.
Then maybe, just maybe, democratic voters will want something other than protection from false fears and false identities. Maybe they will finally demand real change.