5th wheel teething problems? Or junk?

We bought a 2014 Keystone Avalanche brand new and have nothing but problems, all covered under warranty. Our trip over Memorial day weekend may have been the last straw. When we arrived at the campground the escape window was missing. Not broken, gone. I remember latching it after the last use as it was about to rain. The dealer said Keystones have had that happen before, but won't admit the blame. So counting back the few trips we've had, and what's broken or fallen off, we got to thinking if that was normal with a new RV. Five of the last six trips we have arrived with major damage at the campground. Thank goodness there was a campground reviewer at the campground last weekend to lend me a ladder to cover the hole in my wall! He told me he had issues with his big class A until they got them all sorted out. Now we're wondering whether to trade it in or ride this mess out.