Ie, if their only outlet for a guest that "created problems" "did nothing to fix them" was off-site reviews?
I've found folks with the approach of I should be able to slam you publicly react TERRIBLY when they themselves start receiving off-site reviews. And I've found the nutty hosts / nutty guests often have the most time to pursue things like off-site reviews as an "outlet" for their aggression.
I have stopped saying at airbnb when traveling except for big group trips and paying for very premium places because the quality of hosts is problematic as you describe, and airbnb should ABSOLUTELY shut down the false advertising hosts (extra charges after / poorly disclosed "rules", cameras in all the rooms etc). But I do have an outlet, I book a nice room at a hotel - a very predictable experience! And I'm not the only one.