Why is the EU the bad guy here? Its well documented that Greece cooked their books in order to join the EU, the whole thing is their fault in the first place.
Yes, and they should pay the price on their own. But that's not how it works. Financial problems in one country are shared by all member states. It's socialism on an international level.
The ONLY way for a given country to survive in the long term is to leave and make some radical reforms that the EU would never permit. Just a question of who will wise up first.