The "can't turn, can't climb, can't run" stuff -- well, sure, compared to a clean F-16, or an F-22, or any number of other platforms, the F-35 has less maneuverability. This pilot says it better than I can:
https://www.youtube.com/watch?v=tCZmPUQZGvwTo paraphrase him: is the F-35 the world's best pure dogfighter? No. Is it the best pure CAS aircraft? No. For everything else, how does it compare? It's better.
This video is also worth checking out.https://www.youtube.com/watch?v=ZtZNBkKdO5U
Sorry for sounding impenetrable.