Why is there such a disdain for the COD guns in CS:GO? I love the SG!

I've literally never seen anyone call people out for "using COD guns". I didn't even know they were featured there.

it just that the sg and the aug are the "easy way" to kill someon in cs cause you have a zoom and a better hit indicator but the sg and the aug are far less powerfull then a ak47 if you can play with it the oneshot headshot kill is insane satisfying

People find that "noobs" use them too often, and sometimes they can be far too OP, or at least in some peoples opinions.
The SG, as far as I know, it has the best AP in the game and is very good at picking off people from both close by and long range. People are just jealous that "noobs" can use them and get more kills than them. IDK, use whatever guns you want. I honestly couldn't give a flying fuck about anyone saying I'm trash for using a gun that's in the game for a reason.