illyawhy did you post this here instead of talking to him
talking is usually unproductive as he tries to argue with what I'm saying instead of absorbing it and trying to actually improve himself from this criticism, turning it into an argument more than a discussion about how we can improve as players, or alternatively turning to whataboutism and saying
"What about you? What about how bad you are!"
instead of actually trying to improve. Anything I try and say to him is always countered with a statement from him trying to defend his undeniably stupid and shitty actions instead of trying to improve himself. Sometimes, though, he comes back some hours later and apologizes for his actions, and then changes completely absolutely fucking nothing there-on-out.
From this thread, I've gotten real answer(s?) as to what I can do. Even though this thread was made as a complete joke it does reflect reality in many ways and has helped me with this situation overall.