I would love to watch a Romcom where the fiancé is a great guy, the deadbeat guy who tries to steal the girl away is just a dead beat, she doesn't cheat on her fiancé, the wedding goes well, and they live happily ever after.

What a great movie that would be.

A good relationship, a douchebag trying and failing to break them up, a happy wedding, the groom to be doesn't suddenly become a horrible person halfway though the film. I'd watch that