I've bought three different brand truck campers from their dealers and three 5th wheel rv trailers from two different dealers starting in the '60s and had very good experience with all of them. But I wouldn't make a ignorant statement all dealers or owners have had the same experience.
RV industry is a spin off of the mobilehome industry and have worked in both in the '50s/'60/'70s (assy line in the '60s) so I knew what too expect.
The rant from cad could be about many other many products.
To the OP...I would post in other rv websites also and get even more perspective on the FR dealers you asked about. Some are actually friendly.