0
Became a Death Eater
0
Murdered Albus Dumbledore
0
Out Remus Lupin as a werewolf
0
Only cared about Lily, not James or even little Harry Potter
0
Deducted points from Gryffindor because Hermione was "being an insufferable know-it-all"
0
Created the Sectumsempra spell
0
Made Neville almost poison his pet
0
Called Lily Potter a Mudblood
0
Didn't get over Lily hooking up with James
0
Wanted Sirius and Lupin to have the Dementor's Kiss
0
Left his Potions book in Hogwarts with curses written inside
0
Insulted James because he preferred Gryffindor
0
Cast Levicorpus on James before James did
0
Showed favoritism towards Slytherin students
0
Took his anger towards James Potter out on Harry Potter
0
Tried to cast Sectumsempra on James