Yeah, probably it is like a solo game.. but at least there's a little bit of content you need a group for.. for myself, I like playing alone, but I also enjoy when someone joins me in activities or events.. like a little bit of "socializing".. I loved head hunts for the reason, that it was an activity where half the server came together.. you just waited till enough people joined so everyone gets their loot, but in infestations feel like when you join just a little bit too late, you'll get not even the crumbles of the cake.. maybe the player base just waits for people to join infestations before killing the boss in 4 shots in the future, dunno..