sex isn't good?!

I have recently become sexually active, and it's ok at times,But that is just slight pleasure. It's never been good honestly. He likes it, but I've told him it's not that good for me.  We've tried taking it slow to see what feels good for me and him both. But nothing's worked. I just need some advice on how make sex actually good or to know if anyone else had this problem?! Thanks😊