Tunneling is not a problem
The problem is that BT is not basekit, when it should be. And I am saying that as a sweaty nurse main. Killers getting free kills because the rescuer doesn't have BT is a stupid game design, especialy in solo queue because it forces you to have BT to rescue and DS in case your random teamates don't have BT. With your 3rd perk as an exhaustion one (mostly dead hard), you only have 1 last perk to chose from.
Meta slave survivors will go either iron will, unbreakable, window of opportunity or coh for the last one. Any original build is throwing at this point. This meta is only good because it fix what's wrong, especialy at low elo.