He gives bad head 😬

The guy I am sleeping with gives horrible oral sex 🙄 the first time we had sex I didn’t enjoy it and told him he didn’t need to anymore but I never said why... recently I let him and it was so bad. I’ve had reallly good oral sex before so I feel that maybe oral is ruined for me overall. But my question is do I break it to him or can I just tell when we’re doing this next time I don’t like it and literally give him directions lol