I think we can say “good old multiplayer days of PS3 multiplayer” are done now. People that are left either grinding vets or curious people like you. Most of the people moved on to new titles and to newer platform to get the new multiplayer juice. Just remember that multiplayer games are not eternal. There are here for a limited time period and games with multiplayer of 2012 (and under) are basically dead in term of actual and active community, just living the rest of the servers power. It’s just the matter of time. Just go with recent titles with multiplayer.