AITA for telling someone that his art sucks and he won't amount to much in life in front of his friends and family.

Your problem here is that you seem to have decided it's only possible for there to be one arsehole in this scenario. Bad news, bud; you're both arseholes. But you appear to be the bigger one.

Your "friend", who you clearly despise and have resented from day one, earns no money, is struggling, and probably has mental health issues. Why, exactly, do you resent him? If your life is so much better than his, cf. all your lengthy noise about your job and your girls and your friends and your Reddity fame.. why are you on Reddit crying about him for numbers?

It's pretty obvious what his problem is. If you came on here to be told that it's OK to be shitty to people who are less successful than you. Congratulations, you found your audience. All the positive reinforcement you could possibly need!

And all of it wrong. You're a cunt.

/r/AmItheAsshole Thread