I planned to spend most of my time in bed mindlessly browsing the internet while my body recovered from minor surgery. I have over 20 years experience working with and debugging computer networks.
Initially I thought the internet connection was having serious intermittent issues. However it worked fine down at breakfast, two other devices had the issue, and using data roaming was fine, so it was obviously more localised. I pinpointed it to the Access Point outside the room. I reported this to reception, and provided the BSSID of the dodgy AP. The reception staff jiggled some random cables in the network closet (they did the same for my friend - it impressed neither of us) and told me they'd call their vendor.
3 days into the trip, I complained again as despite their claim their vendor had been in it was still broken, and said I could use the lobby. I ended up doing so that night for a few hours (insmonia), lying on the couch - their night staff was resting on the other couch.
Later that day I did the same, and the reception staff were not happy at all at me lying there - at this point they had what sounded like a "get over here now" phone call and soon two workmen appeared. The issue did get a bit better, but was not fixed. At that point I had only one more night so didn't see the point in complaining further given the hotel staff's actions so far.
Only for the gaslighting about the internet, it would have been perfect for my needs. I don't think they ever believed me.