Unfortunately, we like any other fan based are blessed with these "types". It's best to just try to ignore them and not to watch games with them, or else you'll probably want to strangle them. Complain when the game is decided and over, not during it...as if anyone wants to listen to their whiny crap anyway.
It would be nice if the annoying wonders could wait until the outcome before they jump down the teams' throat and throw players and coaches under the bus...and write the season off for that matter. It's pathetic.