Everything was underutilized. Usually movies like this the setting is a character in itself and it was as if Greece was an afterthought. This could have taken place anywhere and it would not have made a difference which undercuts the story.
The characters could have been fleshed out more. Yes, this is about their clearly mismatched/toxic romance, but I wanted to understand them more as individuals. Why did Chloe stay (what was she clearly running from back home)? What did Mickey see in her that allowed him to avoid focusing on his life's own shortcomings? She was a horrible person. She made poor decisions. She indulged in a lifestyle that may have been adopted in Greece, maybe not, but we will never know. Even if Micky was stuck in a perpetually adolescent/self sabotaging cycle I can't see what attracted him to her. It's not like he craved her stability. She couldn't offer any.
Stan and Gough gave amazing performances despite the thin script proving their talent and commitment.