They oxygen delivery system fails and has left pilots hypoxic.

https://www.nwfdailynews.com/story/news/local/2021/08/02/f-3...

The electrical system performs poorly under short circuit conditions.

https://breakingdefense.com/2024/10/marine-corps-reveals-wha...

They haven't even finished delivering and now have to overhaul the entire fleet due to overheating.

https://nationalsecurityjournal.org/the-f-35-fighters-2-big-...

This program was a complete and total boondoggle. It was entirely the wrong thing to build in peace time. It was a moonshoot for no reason other than to mollify bored generals and greedy congresspeople.