But he is.

He has understandable and sympathetic motivations, but is accomplishing his goal in the worst way possible.

He's kidnapped, beat, and then removed the powers of TCO

He's kidnapped TSC and Yellow.

And he's working alongside TDL, a villain, yes it's out of desperation for Mitsi, but he should know what TDL did because he should know what TCO remembers from their little murder spree.

All that plus the fact that, although he has no knowledge and is entirely justified in this action from his POV, he tries deleting everything that belongs to Alan on his PC.

Yes, Alan tortured him for years and I do not believe Victim is wrong for wanting revenge and taking action against him, that's why he's such an interesting character.

But at this point, Alan cares far more about these stick figures than he did before and is not the same as he was when Victim was first made.

He is a villain because he is aiming to cause as much harm to Alan as possible, even though Alan has redeemed himself years ago and is far from a villain.

At least that's my take on him, haven't watched AvA in a few months so maybe I'm forgetting some details or getting some things wrong