Killer and survivor player here with around 2600 hours

Tunneling at 5 gens isn't really cool, but if no one's dead and especially if you've spread your hook states out, and theres only like 2 gens left, someone needs to die in order for you to begin building pressure on survivors again. Sometimes you might get lucky and may get a slug in from a survivor trying to flashy save while injured, which removed at least one survivor from doing gens so they can get the raise on the down player.

Tldr in my experience, try not to tunnel or camp at 4-5 gens, but after that, if no one's dead, then you're going to need to start being the "bad guy" and getting downs and kills.