[2019] Please add some sort of penalty system for repeatedly leaving Strongholds after the first or second chest

I just want to do ONE full run of Temple of Scar, but I can't because everyone keeps leaving after the first two chests. My gameplay is being limited by random people who want to "optimize" their runs despite the fact that Grandmaster bosses drop guaranteed Masterworks now. I just want to play the game as it was intended, not the way other people want me to play.

EDIT: After having some time to think about the issue, I think less of a "penalty" and more of an "alternative". Make Stronghold loot a bit more valuable, and weight more of the loot to drop from the boss, to reward players who stick around through the whole thing, but add a new, and faster, repeatable mission type that rewards standard loot chests in a similar fashion to "chest runs". That way people who do Strongholds have a reason to do Strongholds, and people who prefer the "quantity over quality" method of chest farming can have their fix, too. It's a win/win for both parties.