Trading in a motorhome with water damage

I feel your pain. I have a 2016 Forest River EVO trailer. Used it last summer, took it to the dealer to have it winterized. This spring I noticed the paint on the front is peeling. Went inside and found a pool of water on top of the slide, water on the countertop, evidence of puddles on the floor, and the wallpaper peeling. Took it to the dealership. Apparently it's my fault since I didn't specifically request them to check the roof/seals last fall; I'm a newbie and didn't know that winterizing only means draining fluids/adding antifreeze. Oh, and I'd purchased their 'platinum protection plan'. Also a one-foot long section of seal over the slide had never been sealed from the factory (looks like whoever was installing the sealant ran out and never completed the job). The dealership has submitted claims to FR and they're awaiting the ok to go ahead and do all the repairs (the warrant will cover it). I've tried every argument to get a new trailer, but they say no. I asked about trading this one in, but I've only had it a year and owe way too much on it, so I'd be underwater before I even began and would have to buy a more expensive trlr so they could make their profit. I'm just sick about it. I guess it's my fault; I didn't buy a cover for it and we had the worst winter in years. However, I'd driven around my neighborhood last fall and within a half-mile radius of my house there are 46 trailers and 5 fifth-wheels and only 7 were covered. I figured 'they must know what they're doing.' I'm a 63-yr old single woman who tried to do my research. I didn't read all of my owner's manual, but I never dreamed that a 6-month old trailer would need to have a roof/seal inspection. NOW the dealership has a checklist of things to suggest when someone brings in their rv; but I sure wish they'd had it last fall! I had to cancel my reservation for a seasonal spot at a lake resort because I didn't know when I'll get my trailer back.