They priced themselves out of the tourist market with the overvalued euro.
And of course bubbles expanded all over the Greek economy due to the low interest rate set by the ECB and the easy gov’t loans thought to be guaranteed by the rich euro-countries, mainly Germany.
I went over there a few years ago....It was like Germany owned everything. The hotel I stayed at on Santorini had the check out rules on the back of the room door in German and English. No Greek.
I also noticed no Greek music in the tavernas or cabs....
Very clean...and European and not the dinginess and smell and car honking of when it was deeply third world...
IMO that is...