Worst Christmas movie ever?

So there I was, laid low with my awful cold, watching dvds on the tube last night. I decided to watch a movie called "Four Christmases".

Bluntly put, SIMPLY CRAPTACULAR. Don't say I didn't warn you!

I hated everything about the movie. There wasn't a single character anyone could care about; as a matter of fact, I was sorta hoping that one of the main characters, say, Reese Witherspoon's, had a highly infectious, totally lethal disease and that everyone she came in contact with (starting with her boyfriend, played by Vince Vaughn) would die, instantly.