Sorry your purchase wasn't what you expected, but I don't see the issue here. Your post title, as a 5 day member of the forum, suggested that that the thing self destructed. A blind fell down. Guess what, over the years, other blinds will fall down.....it just happens.
A fender flare is flapping, did you look to see why, maybe a screw was left out/fell out.
The sofa pulled away.....did it pull away 10" or a 1/4"? Tighten it up.
I understand you wanted it to be perfect, but you could have fixed your issues in less time than it took you to write and submit this post. Ten minutes with a screwdriver and you would be sitting at home and thrilled with your new purchase rather than agonizing over a loose part.
Take a few minutes, fix what's broken and then take those tools and put them in a toolbox in the trailer storage. You'll need them later, that's just the life of owning an RV.
Not trying to be harsh, but your trailer certainly isn't a piece of junk, just a new product with a few simple things that need repair. Look it over thoroughly, tighten/fix what you can and save anything major for the dealer.
