This is one of the most frustrating aspects of modern writing. People think that 'mature' and 'realistic' character is interchangeable with 'a character who is a bit of a piece of trash who is awful for no good reason.' You have ridiculous stances such as 'I had to savage the countryside because people treated me wrong when I was younger.'

It's as childish as the older pure-good vs. pure-evil stories, except that instead of being satisfying in a simple sort of way it's just annoying and bad storytelling.