Spider-Man sucks because there hasn't been a decent Spider-Man film yet Peter Parker is supposed to become more self-confident and somewhat of a smart-ass after he gets bitten by a radioactive spider. But Peter doesn't become more self-confident until the third movie and most of this is brought on by the symbiote....Sam Raimi was influenced by the Superman films too much. Spider-Man: The Animated Series sucks too because the animation in that show was absolutely horrible.
Bob Kane wanted Batman to be a normal guy who can be hurt because an ordinary guy with gadgets is more relatable than a practically indestructible demi-god who can lift Kryptonite mountains and push planets out of orbit.