Because Schadenfreude Seahorse is a jerk.

By the way, Slytherin?  Your house crest is easily the biggest pain in the ass to draw.  This is not improving my outlook on how much you suck.

Please, feel free to argue the whole ‘Snape ended up a hero!’ thing, but as far as I’m concerned, Snape was a creepy jerk who felt entitled to Lily’s affection because he loved her and spends his whole life never moving on.  Give him a fedora and put him on OK Cupid and be done with it, Rowling.

Admit it — your feelings for Snape are based entirely on him being played by Alan Rickman, aren’t they?  AREN’T THEY?

Also, show me one other Slytherin who’s not a giant assbag.  I’ll wait.