Getting mad like this solves nothing and adds nothing to the discussion.
It is an argument to me. If they wanted to flip all tank frames to Overguard mechanics they would have done that already. Valkyr, Chroma, Inaros are designed to be HP tanks, Hildryn Shield tank, Baaruk and Revenant tanky due to mitigation or temporary immunity. Imagine how dull it would be to switch all of these frames to use Overguard.
The best point you raised wasn't really yours to begin with with this quote. This is a fair assessment at lower level content where Chroma isn't as useful, I would expect something to be done to work with this in the future with consideration to his kit.
Maybe you need a decent build, 2 Umbral forma isn't really enough for him to me and he just does better in higher level content.
Switch out the melee focus to whatever you do best with. Should be noted that this is with Tauforged Crimson Shards for added Str. This should be able to clear all content in the game pretty fast if you use it right. Hope it helps give a better idea of what his strengths/weaknesses are for you. Please comment if you have any questions.