I disagree. I've been both a host and customer for many years, and in general I've found the customer service to be good or even very good for resolving issues either as a host or as a customer.
In fact, many 'scare' articles about airbnb puzzle me, because it seem seems that the problems could have been avoided if the guest had read the reviews and/or booked with a superhost (or other host with a history of good reviews).
Having said that, I do think it's insane that the reviews are no longer listed in chronological order (or at least with the option to view them in chronological order).