None of that means Peter "needs" a man in the chair.
It wasn't all you got. Those were two words cherry-picked out of a longer answer.
Specifically, I'm not aware of anyone complaining about a gay character turning out to be bisexual. I've seen lots of people complaining about straight characters turning gay.
Turning a gay character straight would be a bigger jump and you may get complaints if you tried that, but one is a move that increases minority representation and the other reduces it. These are not the same thing.
Choosing to give Peter a best friend is nothing to do with political correctness. The race they then gave that friend might be. These are two different decisions.
Anyone with a brain? How could dumbing Peter down be anything to do with political correctness - unless you're really going to stretch it as far as to say they didn't want to allow a non-minority to be too clever - but they they blew that by having Tony Stark in the first film.
The kind who constantly mocks someone and works the crowds up against them. The kind that might cyber-bully someone. you don't need to be physically imposing to be a bully.
I've no idea what you're trying to say here.