If all the other warning signs here in the comments are not enough - this one should be.

I only booked via AirBnB once, but I am quite convinced now that this will be the only time. I don't want to rely on a system that can just do what they want without transparency.

Reality is that a platform like AirBnB should care about both sides - sellers and buyers. Sure, sellers generate the revenue, but without buyers nothing is sold and the platform is not interesting.