[2022] what's wrong with the player matching system in the game?

The Randoms matchmaker sorts teams by ship class, ship tier, and by divisions. It does not take skill into effect and is therefore more "random" in this regard.
The result is that you will sometimes run into games where player experience is weighted more heavily on one side, and others where it is weighted perfectly. That's the nature of random.

With regards to Ranked Battles - you cannot run into bots in Ranked. There are time-gates on Ranked Battles to ensure people play within windows and have other humans to play against.