It's funny you say that, because one thing that crossed my mind when I saw Killer Moth was, "but he's kinda dumb". I respect the decision strictly in the sense of defying the expectation of the character, which is something I think fanfiction should strive for more.
Also, no worries. I feel the same way about shows that get so much praise, I'm such a /co/ntrarian nowadays that shows like GoT and R&M are turnoffs to me now, even though I was watching the latter before it blew up. I do think BB is an amazing show though, and Better Call Saul has its own merit as well. Both feature the character I mentioned, who I think you should look into as an example of how to write your idea.