I think there's objective criticisms of his lead performances. They haven't been nearly as strong as his supporting roles.

Simply put: his style of acting plays better when he has a captain america-like figure to play off of.

Naw eminem shit on him during a rap battle and everyone seems to think they should too.

Same. I only watched the first season and was surprised how entertaining it was and how good he was in it. I don't even dislike him, he's always a bit of a nothimg burger to me. I didn't realize people don't like the guy, but i'm also not into disney movies.

I'm not sure as I don't follow Marvel films, but I did always wonder if racism played a part in his criticism for Altered Carbon. Joel Kinnaman is basically the stereotypical Aryan alpha male actor (in appearance only, of course), so for him to be replaced by shorter black guy is exactly the type of casting choice that would trigger racists. And the second season wasn't as good as the first, but the hate for Mackie was so bizarrely out of line with the okay performance he gave.