Richard Pryor is THE most influential comedian. Eddie Murphy's stand-up WAS a Richard Pryor routine. Chris Rock is also very influenced by Pryor. Same with Dave Chappelle. Hell, Rodney Carrington's stand-up is highly influenced by Pryor.
Pryor is my favorite comedian, and he is the GOAT of stand-up. He translated the stand-up glory to a fine movie career, and was a great comedic actor.
I was a kid in the 70s and 80s, and saw his comedy specials on HBO. I'm sure this is a generational thing as much as anything.
The OP doesn't like him? Well, opinions are like assholes: Everyone has them and they usually stink.
IDGAF if the OP or anyone else agrees with me here. Have your opinions. I'll have mine.