In a Vox column, Jeremy Bulow and Ken Rogoff argue that perceptions of Greek net debt repayments over the last years are wrong.

[C]ontrary to widespread popular opinion, the net flow of funds (new loans and subsidies minus repayments) went from the Troika to Greece from 2010 to mid-2014, with a modest flow in the other direction after Greece stalled on its structural reforms.

They also make some other points:

• Cash withdrawals, non-performing loans and capital losses in the wake of the 2012 Greek government debt default hurt the Greek banking system.
• Mistrust of the Greek government by European partners and Greek citizens slowed down the recovery.
• Greece has incentives to avoid a default on its official loans since default might trigger lower EU subsidies; the loss of other benefits of EU membership; less ELA funding and other forms of financing at below market rates. (Harris Dellas and I have argued the same in our paper Credibility for Sale.)
• As Greece approached the point of being a net payer its bargaining stance hardened.