There is so much wrongness here, I’m going to give up, in a minute. First I must defend this song.
It is the funniest Beatles song. (By Paul and not John, remember) It’s a take off on macho rock.
It is not repetitive screaming any more than many other R & R or R & B songs are. It’s got chord changes, a melody and a passioned if satirical vocal that made it a keeper for those guys. And it doesn’t take up that much precious time. Nuff Said.