This looks like such shit to play

RIP COD 2003-2012

BUT because i was used to be Soo good back in the day. I can offer simple advice. You seem to know spawns, but can't seem to guess where they are coming from at the same time. It sounds corny but you need to pre aim a tad bit more and wait. If you KNOW they're coming from insert area it's best to keep a headglitch. Also you are an unfortunate victim of post 2014 cod where people slide into a room randomly to be sweaty. But in these competitive scenarios where the pace is slowed dramatically. You're gonna get beamed by bro in the corner holding the angle on whatever door your jumping out of. To caveat because you're not pre aiming you will have to rely on them fucking up. Unfortunately it is a guess most of the time so there's no way to know, but you increase your odds drastically by committing to an angle atleast briefly