According to the Pierre Sprey, co-designer of the F-16, the F35 is a turkey. Inherently, a terrible airplane. An airplane built for a dumb idea. A kludge that will fail time and time again. Just impossibly hopeless. And judging from the bajillion times the F-35 fleet has been grounded, well, he's probably not wrong. It's a trillion dollar failure. Watch Sprey eviscerate the F-35 in the video below.
The designer of the F-16 explains why the F-35 is such a crappy plane