One of the last good public multiplayer experiences I had was DiRT 3. Simple lobbies, small player count, people randomly joining and leaving and everyone was chill. You'd occasionally get that guy who was stupidly good, perfect lines through every corner, and the entire lobby would try so hard to keep up. Loved it.
One time I stumbled into a lobby where the host was "hacking" but instead of cheating for an advantage, he was selecting weird car class and track combinations for the entire lobby. Stuff that the game wouldn't normally allow. Shit like trailblazer cars on rallycross circuits. So much fucking fun, one of my favorite memories from that game.
That must've been what, 4, 5 years ago? DiRT 3 released in 2011, so...oh my god DiRT 3 came out 13 years ago...