It looks like your Weight Distribution Hitch is not cutting it for your trailer. The specs for your trailer say it is a 640lbs hitch weight, which is probably going to be closer to 700 + pounds in reality. Your GVWR for you trailer is 7680lbs. 4815lbs dry weight and 2865lbs cargo carrying capability. Even though you probably do not tow with over a ton of cargo in your trailer, you are going to be over the advertised dry weight when loaded up as you know.
My 2018 Ram 1500 I was pulling a Keystone Hideout 260LHS (29'11" feet overall, 5182lbs dry weight, 645lbs hitch weight) My actual hitch weight is 710lbs., and was about 5600-5800lbs loaded out to go(empty tanks). I pulled it fine with my 1500, almost maxed on my axle weight for the truck. Over payload on the truck, but still under gross combined weight rating (truck & trailer together). Kids got older & bigger/heavier....
I would go back to the dealer you got the hitch from and get another one rated for 800-1000lbs instead of the 600lbs./6000 rating. RV dealers usually do enough to get you down the road to make the sale.
If you want something that is easy to setup, look up Weigh Safe TruTow WDH. I want one of them for my setup.
As for what others have said, numbers don't lie and you need to make the best decision for what to do.