First off, I'll start with the fact that PASOK ruined the country by spending massive loans with ridiculous irresponsibility, that's Greece's fault not Europe's.

After that, Greece was now filled with debt it couldn't pay off. Obviously not wanting to go bankrupt, the only way forward was taking another loan in order to "breathe air into the economy". However, the Bailout Programmes actually did everything but that. By forcing Greece to put massive taxes on people and businesses, cutting wages and pensions, worsening work conditions, cutting social spending, the people were brought to their knees unable to get up. When no one has money, it's only natural that innovation completely stops, no one risks opening a business, banks don't risk giving out loans, and society crumbles while the common folk starve.

You might ask, was it a mistake, was the IMF stupid? Not at all. They were very successful in mitigating their own risks from Greece going bankrupt or leaving the Eurozone, mainly in erasing their dependency on Greek bonds. They never cared about our country or them getting their money back, they just cared about keeping us in a depression as long as their banks stay unaffected.