Calculated tow capability... Disappointed

thanks so much. it does handle ok even in strong 35 mph wind. had a small 5th before and have found it is different. going down freeway 55mph and truck in front of me dropped his tire. as i swerved around it, trailer swayed and i almost lost it. grabbed the trailer brakes and it helped get in under control. been pulling something for 40 yrs, but this almost moving to motorhome, but not quite. love my trailer.
am looking for best tow truck, chevy or dodge will most likely go with 1 ton, in case i want bigger. now start looking for diesel posts.