COMEDY ISN'T PRETTY

Comedy deflates pretensions and aspirations. (I had a dream about saying this to someone at a party, so forgive the pretension!) Your basic comic plot lands the protagonist right back where he or she started. (Your romantic comedy doesn't, but it's the romantic part that puts the two lovers together, just as in an action comedy, the hero does catch the crook / find the MacGuffin / trick the bad guy into giving away his dough, but that's the action plot at work.) The classic example of this is the brilliant Dumb and Dumber.

Anyway, the point is that comedy is an essentially sadistic genre. You ahve to be willing to inflict pain and suffering on your hero, poor thing.