Those are two different things.
Rope a dope was a legitimate boxing tactic that worked. He was the champ even if you didn't like his boxing style.
Hot dogging, I can see people being pissed about that. He was the first guy to talk shit, it freaked America out. Even today when it escalates some fans hate that shit. That's personal preference, I look at every strut, bold prediction, trash talk, chest thump, fist pump on an individual basis. I like it when Kane does the fist pump after a game winning goal, I hate Rogers discount double check after a TD against the Bears.
Ali may not have invented showmanship in sports, but he perfected the athlete as a showman. If you don't like that behavior, blame Ali. If you think sports are more interesting with the flash, thank Ali.
I thank Ali for making the world a more interesting place. RIP