Well you've got yourself a little conundrum there don't you? You've got a touch of alpha-male syndrome. First, what do you want?

Do you want a hot loser or do you want a mediocre-looking winner?
Do you want to be treated with dignity and respect or are you willing to put up with an a-hole as long as he's hot?

Now ... what makes you think you deserve more? You say you do, but you obviously don't believe it or you would quit hanging around them. You're getting some kind of emotional currency from them. What is it? They're giving you something that a nice guy can't. What is it?

I'm guessing it's probably attention. Jerks notoriously pursue while nice guys usually give you space. I can't say for sure, but getting attention from a hot guy that's a jerk is much easier than working at getting to know a nice guy. Emotional/relationship laziness?

So what's the call? Take the easy way and let the slime come to you or kick them to the curb and go work at finding someone that's hiding under a rock that will treat you with dignity and respect?

But I'll tell you, as long as you surround yourself with a-holes, you'll never find anyone better.