Alright, let's get it all out of our system. Argue like nerds here about Pokemon Type chart matchups.
Try to keep things less vitriolic than usual, hmm? ALL OF US have a few bad takes and terrible ideas. Just be chill.

I don't think Steel should resist itself. If something has metal armor, you need a material AT LEAST as hard as that metal in order to scratch/dent it. It should be neutral. A metal shield requires a metal-or-stronger sword to counteract it.