Zephyr Teachout had a oped at The Guardian that I tend to agree with.

A portion of which.

It looks like “Middle Class” Joe has perfected the art of taking big contributions, then representing his corporate donors at the cost of middle- and working-class Americans. Converting campaign contributions into legislative favors and policy positions isn’t being “moderate”. It is the kind of transactional politics Americans have come to loathe.

There are three clear examples.

First, Biden’s support for finance over working-class Americans. His career was bankrolled by the credit card industry. He delivered for it by spearheading a bankruptcy bill that made it harder for Americans to reduce their debts and helped cause the financial crisis. He not only authored and voted for that bill, he split with Barack Obama and led the battle to vote down Democratic amendments.His explanations for carrying water for the credit card industry have changed over time. They have never rung true.

The simplest explanation is the most likely: he did it for his donors. At a fundraiser last year, Biden promised his Wall Street donors that “nothing would fundamentally change” for them if he became president. Now the financial world is raising huge money for his campaign. It clearly thinks he’s going to be its friend if elected. Most Americans, who get ripped off by the financial sector on a daily basis, aren’t looking for a candidate who has made their life harder.

There is more at the provided link.

So how does Bernie respond to this?

https://thehill.com/homenews/campaign/479084-sanders-apologizes-to-biden...

Sen. Bernie Sanders (I-Vt.) apologized to former Vice President Joe Biden (D) Sunday night after an op-ed by a Sanders campaign surrogate published in The Guardian accused Biden of corruption.

The Vermont senator told CBS News that he regretted the message published by Sanders surrogate Zephyr Teachout, who does not hold an official role with the campaign but has endorsed and introduced the senator at his rallies.

"It is absolutely not my view that Joe is corrupt in any way. And I'm sorry that that op-ed appeared," Sanders told the news channel.