If I ever had a truck that regularly got to the point of over heating while towing at its rated capacity I would definately not consider it a great truck, Especially considering this isnt a one off single truck issue this seems like across the board the ecoboost isnt up for the work its rated to do...
Have you ever owned a Cummins? You can melt down the turbo without even thinking about it. I don’t think there is a single truck out there that can tow its max capacity and throttle up a mountain side on a regular basis and not at some point have difficulty keeping cool