I tend to agree with the other posters here. You are calling "foul" on a dealership you used from 3 years ago and over 11,000 miles ago? Um... I don't think so.
I no longer have a travel trailer, but after many years of TT ownership and 3 different TT's at that, I always checked my WD system over carefully. After 10 years and on the 3rd TT, the hitch head bent (age, wear? who knows?) It was a Reese old style, bars with chain and separate friction sway bar. As soon as I realized the hitch head was not straight any more, I got a new WD system immediately. Went with the Equal-i-zer. I can't blame the original dealership for the bent hitch head after 10 years of use. But I am glad I inspected everything, almost every time I hitched up.
