I hate HPMoR. I hate its smug mansplainy "I can min-max Harry Potter" mode of existence. I hate the way that lots of its readers don't know the fanfic world and don't understand how mediocre HPMoR's characterization is in context. It just makes me angry. (NB: When I read it it wasn't finished, but I didn't read to what was the end at that time; I gave up about halfway through.) If it earns a Hugo I will throw things, but I really doubt it will, for many of the reasons you mentioned.

(Sorry for tossing my HPMoR rant at your much better-reasoned points.)