They are just simply growing pains that every new airplane goes through. The F-35 is after all an incredibly complex piece of machinery. These things meed to be put in perspective.Perhaps Fixes are on the way like maybe just maybe increased maneuverability so it can turn with the Su35 or later birds increased engine performance to provide a increased thrust to weight ratio so it will have that maneuverability and simplify the thing in other Cancellation of further purchases till these things are fixed once and for all, Geez for a program that started sucking money in the 90s it's time to say Enough is Enough
Take the F-16 as an example. The following account is from someone who had to deal with its growing pains in the early years.
In 1981, I was an Air Force captain stationed at Nellis Air Force Base — home to one of those fighters, the then-brand-new F-16 Fighting Falcon. It was an incredible aircraft, featuring leading-edge technologies such as fly-by-wire flight controls and redundant flight-control computers, unheard of maneuverability, along with unprecedented levels thrust and fuel efficiency.
However, there was one problem: Our early F-16s kept crashing. We lost four aircraft in my first 44 days at Nellis. Wing commanders were lucky to last a month. In fact, there was a macabre joke circulating that if you wanted one of the new jets, just buy an acre of land off the end of the runway and wait, recalled veteran F-16 pilot Pete Gavares of the program’s early years.