Well, I dont take your reasons seriously unless you tell me you own both and its an unbiased oppinion. I can easily find faults in anything if im searching for it. If I google: xbox series x gets to hot, surely there will be post made by people saying their xbox gets to hot etc. Should I then start using "xbox gets to hot" as my reasoning for not liking it? No.
As for the ones you posted,
They are both big and ugly af.
They are both ecually as expencive.
Controller malfunctions? This is normal with electronics, will happen to a very small amount of buyers, on both systems. Unless its an xbox 360 haha :P
These things are "bagateller" if you know what I mean. Im sure the noise is low, but its louder than something thats slightly more silent.. Makes a weird noise from the disc reader? Cmon man. These are not reasons that should sway anyone >_<
Game library, price, what system does your friends own, prefered controller, prefered os maybe, innovations? These are reasons in my mind atleast.