Regardless of how it doesn’t even make sense to think of K2SO as a “disabled” person, I find it kind of reprehensible that K2SO being the equivalent of a disabled person makes him unlikable. There are a lot of physically and mentally “disabled” (I don’t like that label) characters in cinema and television that are very likable if not iconic. Forrest Gump, Geordie LaForge, Rocky Balboa, etc. etc. An actual robotic equivalent of a so-called disabled person is Data from TNG, who is often considered to be an analogy for the struggles that autistic people deal with when trying to understand social cues and interaction. If K2SO actually was a robotic “disabled person” then that may have made him more likable, or at least interesting.

EDIT: To be clear, I did right this before seeing your explanation a couple posts up, so bear that in mind.