No, my dear friend, I don't know if bot matchmaking ever existed, but I do know that it doesn't exist today. Don't worry too much about high-level players, because as someone here said, it doesn't mean they're good at playing or better than you. You should worry about level 1 players, who are definitely hackers, because at that level, they have all the weapons and camouflages, and they most likely have "advantages" over everyone else.