No, that's not normal.
I have a 20ft travel trailer, which weighs about 3000 lbs. Loaded about 4100. I have no problem towing it with my 2016 Double Cab TRD SPORT 6cyl
auto. I just bought mine July 2017. Had a 2008 Ranger FX4 4.0l. This could not haul it worth a damn!!
This is my first Toyota...