If a killer camps a survivor on a hook it ruins the game for that survivor and team. My idea is that the longer the killer looks at a hooked survivor, the more they lose their sight. Like when a flashlight is used but slower of course. The lore behind it could be, "Survivors lose their hope when stalked on a hook, leaving…
My only qualm with the Ruin hex is if there is only one survivor left with 5 or 4 generators left the hex should break itself. Not fair to last survivor if their team mates sucked so bad no generators got fixed. Feels like the survivor has no chance.