In the old days, you would play multiplayer with your friends and their friends on a private server or some kind of community server where cheaters could quickly be recognized and banned by the admins. Now this communal way of playing online games is largely gone and replaced by match making which makes multiplayer basically the same as playing against cleverer bots.
Match making is more convenient, especially for lone players, and I don't think the change was done out of malice. Still, it feels like something was lost with the disappearance of private or semi-private community servers, easy policing of cheaters being one of those things.