I'll add this, since much of the criticism of Varoufakis reminded me of this quote by a US Civil Rights fighter and eventual US Congressman:

If you object to unfair treatment, you're an ingrate.  If you seek equity and fair consideration, you're uppity.  If you demand union security, you're un-American.  If you rebel against repressive management tactics, they will lynch and scalp you.  But if you are passive and patient, they will take advantage of both.-- Congressman William Clay, Sr., speaking to the AFL-CIO Federation of Government Employees, 1975

Right now I'd like confirmation of this story from Greek sources: Draghi asusta a los socios y a Atenas

El pacto se fraguó en las horas previas a la reunión, con conversaciones de última hora entre el jefe del Eurogrupo, Jeroen Dijsselbloem; el primer ministro griego, Alexis Tsipras; el presidente del Consejo Europeo, Donald Tusk; el propio Draghi, el ministro alemán Wolfgang Schäuble y el italiano Pier Carlo Padoan, el comisario europeo Pierre Moscovici y la jefa del FMI, Christine Lagarde. Destaca la ausencia del ministro griego Yanis Varoufakis, que no estuvo en esa ronda previa.

Draghi spooks the partners and Athens

The pact was forged in the hours before the meeting, last minute talks between the head of the Eurogroup Jeroen Dijsselbloem; Greek Prime Minister Alexis Tsipras; President of the European Council, Donald Tusk; the Draghi himself, the German Minister Wolfgang Schäuble and Italian Pier Carlo Padoan, the European Commissioner Pierre Moscovici and the head of the IMF, Christine Lagarde. Highlights the lack of Greek Minister Yanis Varoufakis, who was not in the previous round

A society committed to the notion that government is always bad will have bad government. And it doesn't have to be that way. — Paul Krugman

A defense of Varoufakis would be best done by Tsipras speaking in the EP forcefully but with a smile, as he does so well. (No expressions of confidence!) And he could make the case for Schauble to be replaced, especially as chair of the Eurogroup Ministers, (he is the one refusing to negotiate0, while noting that Varoufakis is going nowhere so long as Schauble remains. And he could then assert that anytime media leaks result in character assassination type articles against Varoufakis that the verbatum transcripts of what occurred, with video if possible, will be released. Assert that what Schauble and others find objectionable is that Varoufakis is highly effective at pulling down the lies on which current policies are based, and that, while critics do not like the politics he and Syriza represent, that politics is what got Syriza elected and will get them re-elected with an even larger majority.    

"It is not necessary to have hope in order to persevere."

Nah, that would be silly and run against the adult in the room strategy.

About the leaks, remember it was the first  Wed. meeting where the document was leaked first to Peter Spiegel.

If leaking to the press is so untoward, why did the Eurogroup do it first to embarrass Varoufakis.

And remember, Varoufakis tweeted Spiegel to write that his conclusions were dubious.

I think the Greeks learned a lesson. That negotiations should be conducted through the press. And indeed, they stuck to that principle all the way through negotiations.