Soldato
For all of its flaws and issues, PUBG is probably my most enjoyed and most time I've sunk into a game. Could also have something to do with the squads of people involved in also.
I've put 2000 hours into PUBG now playing it again a bit after a few month break.
The game is 95% just frustration, in nearly all respects.
But..... But that 1 game you get every now and then that you really struggle the whole way through and pull a win with plenty of kills is the most rewarding experience.
It's not my GOAT, but it's up there.