I'll admit, I'm probably a weak player.

I play a lot of 5-10, 10-20 at paradise. I generally lose, unless im on a card rush. THe thing is, I get raised and re-raised by inside straight draws, vs my Top Pair best kicker, and drawn out by an A5 suited. But I really don't know what I'm doing wrong. In the long run, youre supposed to win with excellent starting hands right? Only problem is, It seems that in the long run I lose my profits, and then some. There has got to be something i dont know beacause I almost always get beat by trash. Is there a thing as a good trash hand? WHat am i missing here?