The AirBnB review system feels fairly useless. I've had some pretty poor experiences with AirBnB, but I am loath to give severe ratings or write anything too awful. I would like to give fair warnings to subsequent guests but it never feels like it would help. Instead I do try to give direct feedback to hosts if they are available.

Maybe some way to secretly write problems, and get next guests to agree/disagree with each concern?

Repeatable patterns of problems (rather than one-off bad luck) are what I'm most interested in avoiding.

I find booking.com has been more reliable, and less risks of unexpected costs. AirBnB is usually way less professional.