idk if a debate is the right idea with this guy, tho i have thought of making a response video or something along the lines to not just his claims but all erroneous claims i've heard from pubber youtubers. debate can be derailed or the optics of it slanted if ur not confident enough (u can make all the right points but without zingers / if u get rattled u will 'lose', especially in the eyes of pubbers who because of all this anti-comp propaganda would be praying on that anyway)
similar to what others have brought up in this thread u have to realise these guys don't like comp THEN come up with the reasons as to why. they dont engage with it and decide it's not for them, they KNOW it's not for them and come up with some BS as to why. people don't have to like or play comp, but i think they should have to acknowledge that we simply love playing the game far more than them. they play the game for the funny voice lines or hats or to sit around taunting, we play it for the actual gameplay (shock!!)