Unpopular opinion: the fandom version of an angry Kix yelling at his brothers doesn’t match the deserter’s episode Kix that very quietly and as politely as possible reminds an injured Rex that he outranks him.
Kix is most likely stern when it comes to the health of the men, but never rude. He’s a sensitive guy who got actually angry at some carrion-eating alien birds for preying on his fallen brothers. He soothes the injured clone in umbara before giving him a shot “there brother, this’ll ease the pain”. Even when Fives, being hunted by the republic asks him for something quite difficult (getting Rex and Skywalker to meet him), he never screams or gets angry at Fives, on the contrary- he’s scared for him.
TL;DR: Kix is not ever rude to his brothers or scream at them, but is a soft badass clone who just wants to keep his brothers alive.
YES!!! THIS!!!!!! And the ONE AND ONLY time Kix was rightfully angry was when Rex didní allow him to coma back to save more brothers:
And even then, HE IS NOT SCREAMING!
This was the only time he lost control of himself and it was because he had been tolerating Krell´s attitude for days probably. It took days for Kix to finally snap, and even there, he only said ONE thing.
Then he spent the rest of the time being a sweetheart and helping his brothers
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