@Marco1436 Your tone here is extremely rude and aggressive- you say Airbb doesn't care about hosts, but these other hosts are taking time to respond to your post and you disrespect them?
Yes, occasionally there are amenities a host has listed, which for some reason become unavailable before the guest's arrival. In that case, it is up to the host to message the guest before arrival to explain the situation and give the guest a opportunity to cancel, with full refund, if the lack of that amenity isn't acceptable to them. Or to offer some discount or refund if the guest still wants to stay.
To simply have a guest arrive to find that one of the amenities they said were there isn't, and expect them to be okay with that, is quite unprofessional. While Airbnb CS reps often make terrible, unfair decisions, in this case, they were sticking to Airbnb's stated policy and what it would be a reasonable response in most host's minds.
If a guest were to involve Airbnb and demand a refund for something like missing shampoo, I'd consider that very scammy and petty, after all, the guest can just go to the store and buy some shampoo for a couple of bucks, but missing Wifi, when a guest may be dependent on it, isn't the same at all.