The Ukraine's Euromaidan Revolution has failed.
That's a bold statement for me to make, so to back up the statement I need to go back to the primary reason for the Euromaidan Revolution.

The spark that lit the Ukrainian revolution was Yanukovych’s rejection of a trade pact with the European Union, yet the reason for the revolution was the population’s despair with the most omnipresent, all-encompassing and brutal system of corruption ever established on this planet.

Forget Putin's propaganda about a "coup". A coup generally involves the military. This was a revolution.
However, for a revolution to succeed it must accomplish its goals, not just regime change. Because regime change can happen any 'ol time and mean absolutely nothing to the public.

Yesterday Ukraine's Prime Minister Arseniy P. Yatsenyuk resigned while sending out cryptic tweets.

Arseniy P. Yatsenyuk, the prime minister of Ukraine, announced his resignation on Sunday in a surprise move that opened a new period of political uncertainty here.
Mr. Yatsenyuk, an economist and politician backed by Ukraine’s Western allies, including the United States, came to power two years ago behind the wave of popular anger that culminated with the Maidan street protests, which led to the downfall of President Viktor F. Yanukovych. Mr. Yatsenyuk and Petro O. Poroshenko, who became president, emerged as the nation’s most prominent figures.
But the revolution’s leaders soon turned on each other. Although authority is supposed to be balanced evenly between the president and the prime minister, Ukraine’s Western allies eventually sided with Mr. Poroshenko and pushed Mr. Yatsenyuk to step aside.

OK. So our guy won the power struggle. That's a victory, right?
No.
What happened is that the most corrupt and hated guy won.

Two years after the revolution that toppled Ukraine’s pro-Russia president Viktor Yanukovich, dozens of demonstrators were burning tyres outside Kiev’s presidential building again on Friday, amid scuffles with riot police.
“We want him to come out here and talk to us, to look him in the eyes and ask: what is going on in our country?” said Serhiy Koba, a protest leader — referring not to Mr Yanukovich, but to his successor: pro-western president Petro Poroshenko.
The street protest capped a bad week for Mr Poroshenko. It began with disclosures in the Panama Papers that he had set up an offshore holding company to move his confectionery business — a pillar of his billion-dollar fortune — to the British Virgin Islands.

Yes, the guy implicated in the Panama Papers scandal and the 20% approval is the guy we backed. Hurrah?
Recently Yatsenyuk lost a political ally to a Swiss money laundering scandal.

Mr Poroshenko’s image was dealt another blow last month even as he allowed another presidential loyalist to be removed as Ukraine’s general prosecutor. The US had openly urged Mr Poroshenko to sack Viktor Shokin, who had failed to prosecute a single member of the Yanukovich regime or the post-revolutionary elite.

Back in February, Ukraine's economic minister resigned under equally damning circumstances.

Speaking in Kiev, Aivaras Abromavicius said he had no desire “to serve as a cover-up for covert corruption, or become puppets for those who, very much like the old government, are trying to exercise control over the flow of public funds”.

Ukraine was ranked 130th out of 167 nations in the Corruption Perceptions Index.
Even the pro-Maidan Revolution NY Times has posted the headline: The West Is Enabling Graft in Ukraine.
Both the IMF and Washington are withholding loans from Ukraine until it implements anti-corruption reforms. This is a huge problem because Ukraine's currency is near collapse.