If it was a suicide, I feel like they would have disclosed if it was over hate. I don't remember Moonbin being particularly hate.
They have their own lives and issues too
People dont kill themselves just over hate. Jonghyun wasnt hated but he couldnt like himself he had many demons and he gave up fighting them. People commit suicide for MANY reasons it has nothing to do with just hate. Moonbin was loved by many that doesn't mean he was happy...