Respectfully, that’s incorrect. The top hat spacer has no effect on ride quality and certainly doesn’t transfer more energy to the rear. In off road scenarios where you’re using all available travel, yeah a spacer will affect your useable travel and thus decrease ride quality. But for daily driving on pavement it should have absolutely
It’s gotta be your tire pressures. Lower them to 30 in the rear cold and 36 up front. These trucks are extremely comfortable and your leveling spacer should have absolutely no effect on the ride. If the tires don’t fix it then I don’t really know what to tell ya. Probably your best bet for the best ride quality would be to install the Carli Commuter kit. But if you’re saying it’s so bad it’s tortuous in the back seat I doubt even the Carli kit would make you happy. I’ve done road trips sitting in the back seat of my truck with a 5.5”spacer lift and 37s and the ride was unbelievably comfortable
I guess I can try to lower tire pressures. They’ve always been at 36 which is what is on the sticker in side the door. I don’t want to go too low in the front though my tires are close to bald on the outsides