Update: wow, I had no idea my incoherent rantings would get such a response. I always learn so much on these forums!!
I went to the front desk yesterday and complained about the mattress. Concierge had me wait there for a maintenance CM to meet me and I had to walk him to my room to inspect the bed - is this normal? They can't just take my word for it? CM (Woody! He was soooo nice!) was shocked bc it's a brand new mattress (newly renovated room) but yeah he agreed it was dead. He took photos. He said "this is a hotel, at the end of the day we're selling sleep".
He was great, but the front desk sort of made me feel like I was inconveniencing the hotel, rather than the hotel having inconvenienced me. No one apologized for the bad experience with the bed.
There's something else, too - I'm on this trip solo. Did my first solo trip to the Boardwalk in the spring and it was such a wonderful experience I decided to do it again. For a single woman, Disney is a safe and comfortable place. But this time I got some weird comments about being alone, from both CMs and other guests. I can ignore other guests but was really expecting better from the CMs. Overall the WL has left me pretty heartbroken, with the backpain from the mattress to boot. My flight home today is going to be very uncomfortable. I'm going to sit on this for a few days to see how I feel after getting back to my real life, but I intend to write a letter to the general manager.