I actually enjoy Ultimate Spider-Man for what it is, it doesn't try to be deep, it doesn't try to be a comic book show either, which I believe is why people dislike it. It's a lighthearted show that's full of Marvel characters that don't quite follow their comic book counterparts. Sure, it could be better, a lot better, but if you enjoy it for what it is rather than for what it could be, it's better that way.
Man of Action even said, they wanted to make it as if Spider-Man was just made yesterday, they were doing their own thing not Marvel's.
But no matter what, there's something wrong if you don't enjoy the Stan Lee skits.
Also, I sent XIII Heartless a Private Message about the show and he never got back to me.
And XIII, there were budget issues with Wolverine and The X-Men.