What a shame. She has no idea what she is missing out on.
If I had said "never again" after my first hostel experience in Venice Beach, I would be a lot poorer now, in both money and experiences. The top bunk was so close to the ceiling one could not sit up. The majority of residences were permanents and not travellers, the bathroom was used by some as a storage room and was disgustingly filthy to use. The so called 'breakfast' looked like it had been reheated a dozen times. But I learned from the experience. I learned what questions to ask, what to look for in reviews and what to look for on arrival.... before I committed. After that one experience I have stayed in dozens of wonderful hostels, and still a few which were not as wonderful.... but none like the first time.
Couchsurfing was a bit the same. The very first time I was with a lady and her two adult sons and two pit bulls. Me! who is terrified of dogs.. Cleanliness was not on the top of her priorities, though it was adequate. Turned out she has a heart of gold. Having couchsurfed in a village in Ghana, she learned that the village did not have clean water, nor a school. Through her fund raising that village now has a new school and several pumps on bores sunk to provide clean water. (I spent the evening with her making things for her fundraising.)
I would have been much the poorer for not having met this wonderful soul in Hartford CT.
Travelling is all about seeing places and meeting people. So why would one not accept hospitality from those folk?
Lifey