Had a couple of girlfriends who could not orgasm or found it difficult.
My massager usually did the trick though.
Had another girlfriend who could only get off if she was being frigged off in a public place, visits to the cinema were fun.
They all enjoyed sex and lived with the fact that for them the climax was not the be all and end all. They still loved doing it.
Never had a GF who would not go down on me, or let me go down on her. Had a few who did not like anal. Never bothered me, so long as they enjoy themselves.