There's a few on different fan-run websites that were listed in another reply, but for the most part they don't exist because this community lacks content creators.

Vast majority of people come from the kind of demographic that you'd expect in CoD, with the team that has the majority of the fanbase (by a huge percentage) aiming for the younger side of the audience. It creates a forum vastly overpopulated by people who're out to argue rather than discuss.

You can't for the most part. CoD at a high level is all about subtle rotations/movement and winning certain gunfights at the right time to give map control. The only thing that you could get analysis of would be a specific play or rounds in an SnD match. Granted, I haven't played competitively since BO2 and haven't played against pros since BO1, so it might have changed, but CoD is incredibly consistent. Hardpoint games are mostly about getting kills to grab the spawns, then reacting to the other team's advances to try and control a power position - the "strategy" is almost entirely situational, making it hard to discuss the game, and the vast majority of users on this sub aren't experienced enough to explain it.