That's literally the one example the Ford, FCA and GM fanboys like to point to...yes the frame rot was a big deal, no one will dispute that.
The difference between Toyota and the domestics is that Toyota went out of its way to replace all the bad frames, and arguably even some that weren't bad, to uphold its reputation and make good on its product. Why don't you go talk to 6.0 Powerstroke owners or Ram 1500 and 2500 owners who have had longterm transmission issues...go see how they fared on their truck ownership experience. Crappy dealership experience and bad warranty coverage is well known with many of the domestics...and I'll take a few less mpg's and slightly outdated interior any day of the week if it means that I don't have to haggle with some service rep over why my vehicle won't get fixed.
Part of the reason the domestics change 2-3 generations for every 1 generation of Toyota is that they want customers to keep buying new trucks rather than hang onto them for 6-10 years and see how shoddy the build quality is. Also these "generational" changes really don't change the vehicles that much...same basic architecture with some slightly new interior tech, and different body panels. The brand new F-150 and Ram 1500 is remarkably similar to the 'aged' Tundra in terms of underlying platform design...the people who tip their nose at the Tundra because its a dinosaur focus on the superficial appearances and amenities rather than the chassis components.