Warping walls

[Blaake]

Are keystone hideouts not mad with texas heat in mind? I just bought a 2022 hideout last summer and everything was fine until halfway through summer. Now all the walls are warped and the ceiling is saging a bit in spots. I had a repairman come out he said there's no leaks but it's due to humidity and moisture not escaping what should I do to dehumidify the walls and ceiling through the summer I'm already running a dehumidifier non stop what else can I do.