Those F-35s are stupid creations.
Their superiority relies on constant data traffic and good means to engage enemy from afar. That data can be followed and it does not even need to be deciphered. The data traffic only needs to exist for anyone to pick it up and follow. Now you have invisible device with visible path. Just stay hidden follow the data trail and strike when close. If the data links is closed, their operability would be lessned quite a lot. And there are means to disrupt or interfere the data.
Okay. They're not stupid creations, but they have their weaknesses which if overlooked will come up as disaster.
And they're expensive and filled with tech you would not want to end up in enemy hands.