...are you seriously that sure that Quirrellmort isn't Mr. Hat & Cloak & thus didn't Obliviate-blast Hermione & didn't set her up for murder & didn't have Draco nearly killed (not to mention that debacle with the Armies), and that he didn't have anything to do with the Troll (despite canon) & Hermione's body disappearing (though there are serious suspicions that Harry dealt with that himself), and that the deal with the Dementor eating Harry wasn't intentional, and that perpetuating the conflict with the bullies via the 100 House Points was accidental, and other things that aren't outright against the protagonists (like revealing Snape to the bullies), and honestly probably more things I'm forgetting--you're seriously that sure that he wasn't behind any of those things that you don't even mention them as possibilities for what he could have done?

Actually, thank you for this post. Forcing myself to think up and list all of the ways that I believe he's acted, contrasted against what we know he's done and given that we know via Eliezer that Dhveeryy vf Ibyqrzbeg, has eliminated some of my doubt that he was involved. It makes no sense for him to be so important and yet do so little.