No, the F-35 is one of the top 3 (depending on how you estimate the capabilities of the J-20 and the importance of sensors it could easily be #1) air superiorit

No, the F-35 is one of the top 3 (depending on how you estimate the capabilities of the J-20 and the importance of sensors it could easily be #1) air superiority fighters in the world. A large part of that is simply that it's the first fighter designed since Moore's Law really got going in the 90s. Yes, the F-22 was designed after Moore, but it was an 80s design using hardened 80s computers, and its computing architecture is still reminiscent of that era. The F-35 is a 90s design using 90s computers, and our idea of computing changed significantly from the mainframe-style "upgrade one a decade" concepts dominant in the 80s to the PC "upgrade once a year" of the 90s. Combine that with American dominance in sensors and engines and even though the F-35's kinematics may not be as great as the F-22's, it's capable of killing airborne targets without needing those kinematics. The big unknown is the J-20 and whatever next-gen programs the PRC has going, but _currently_ the F-35 is likely better at killing air targets. NGAD exists to be a fully-upgradeable air superiority counterpart to the F-35. It'll be 100% air superiority like the F-22, but will be upgradeable with relatively minor revisions like the F-35. It's designed that way because almost certainly the PRC air superiority fighters will be designed the same way. Its existence isn't a condemnation of the F-35, any more than the existence of a high-low mix isn't condemnation of the low part of the mix.