Because the issue is that it's ok to not like him. He's actually not very likeable. But when you say you don't rate him it's just ignorance. He's one of the most accomplished and gifted strikers of his generation and he's recognised globally for that.
He's played for Ajax, Juventus, Internazionale, Barcelona, Milan, PSG and now Manchester United.
You don't have that kind of CV if you're not of immense quality. That's not disputable.