The problems of youth *sigh*. I will say if you are in a relationship then you should be able to communicate and work on what is causing 'bad sex'-you are in a relationship-different than a one night stand. 'Bad sex' is sex that is not satisfactory in the mind of one or both partners. If it is not at least as good as jacking off, or is not giving you something more than that can give you, then why have it?
I think people have way too high of expectations(maybe from porn?) regarding sex (and sometimes use the best sex they have had as a standard of what they want...there is a reason it was 'the best sex you ever had'..because it was the exception and not the rule! duh!). but at the same time there are some minimum requirements as well lol.