Yes, the F-35 is so bad that literally every single allied country is ordering and is willing to wait for like 5+ years just to receive it. It is the best selling aircraft out there, with insane capabilities for its price. America cant produce these things fast enough.
https://en.wikipedia.org/wiki/Lockheed_Martin_F-35_Lightning_II#Operators
More than 20 allied countries have bought/ordered it and in significant numbers. It is going to be the future backbone of the airforce of most of those countries. Just because it had issues, doesnt mean that it isnt good or that many of its serious issues havent been resolved.
Also the F-35 has built-in networking and infrastructure to work as a mothership for “drones” or other remote controlled/ai platforms.
I dont understand what you are trying to say. Too big to fail is used to describe something that is failing but cant be allowed to fail because it is too big.
As i wrote, the F-35 is far from failing, it is one of the most successful airplanes ever made, at least in terms of sales. Many european countries, which were big proponents of the Eurofighter and kinda ignored the F-15/F-16/F-18 platforms, are buying the F-35 simply because it is not only better than the Eurofighter/Rafale/Gripen, but it is also cheaper.
If the F-35 was bad or even medicore, those countries wouldnt be so willing to buy it, in mass quantities, with deliveries all the way into the 2030. Many of these countries also intend of creating a similarly featured plane but they wont be able to make one for another 10-15 years. So in the meantime, they are dependent on the F-35. They could use their older planes but they obviously see something in the F-35 that makes it a must have in the meantime.