Well, Ill be honest. Ive never been to Greece, but Ive been to Poland, Hungary and either Slovakia.
From what Ive seen on so many videos (Im interested in Europe and traveling), Greece is total shithole out of few "big" cities. For example two czech travelers went to greece, they got stopped by local police (dont know if it was state police or city police) that didnt even have a car that would look like a police car (so they thought they are gonna be robbed). The police took them to the station which was like 70 years old building that was almost ruined (not even painted) and the whole city/village looked like that. Also dirty beaches out of tourist locations, dirty nature, etc.
Greece has beautiful places like for example Santorini but those 3 countries are still much more developed all their lands than Greece. Not even mentioning your huge debt and standard of living.