It's important to know that his entire character is a parody. Honestly if you can't see that... Well...
He calls himself "the two time", aka the two time champion, as he won some Nintendo competitions in the 90s or something like that. Obviously a laughable claim to fame/success that the character is clinging on to. He goes on about athleticism and the height of his vertical leap for God's sake. He takes it so violently seriously that it couldn't be more clear that the character is a joke from head to toe. You're meant to dislike him. If Ali G can be entertaining as a character, Dr Disrespect can be (and is, to me) too.
I get the feeling there's a lot of envy flying about in this thread. I see it a lot, people thinking that these streamers just sit and play games, and it's so easy. It isn't easy at all, they put an insane amount of work in to what is a terribly competitive industry, often taking leaps of faith by risking ditching their precious careers/jobs to go full time. If they didn't, they wouldn't be as successful as they are. Dr Disrespect's production values are off the scale, in a stupid overblown and tacky way, yes, but that's exactly the point.
Mind you, to be fair, as a former basketball player and given that he's something mad like 6ft 9, he does have an impressive vertical leap