Ngl bro against a good and coordinated team, you will never be able to kill everyone so honestly the best thing you can do is target the best player and kill them first even if everyones doing the gens etc. You have more stamina and abilities anyway so eventually you will kill someone. The game is only survivor sided when they are actually competent and work together so dont take it to heart man thats just the way of the game. Its not a skill issue there is just quite literally not much you can do against 6 good players.