Adam Warlock almost seems like just a normal dude. He has a normal dude name after all. That's the type of name for a cool tax guy. The reason why he's so human-like is because he was created to be the perfect human by a group called the Enclave. It's not like these Enclave guys had good intentions with Adam Warlock, which is something he found out while in his little growth pod. Not about to be some kind of human slave, he broke free and teleported out of there.
Since he's practically a child in a grown man's body, he doesn't really know what he's doing and gets into trouble. At one point he tried to force himself on Sif, Thor's love interest, which got his ass kicked to next Sunday. You don't mess with Thor's girl, dude.