You can still find matches on pc pretty easily, helps that there’s been no good successor other than the -tide games and people not into warhammer or 40k stuck to l4d(2)
Honestly the best new coop shooter is deep rock galactic, fun game, many bugs to be shot, no monetization after buying (theres a free battlepass, but after the season the cosmetics get into normal loot drop, and supporter skin packs).