It's light years ahead of the F-15 and F-16?
I would certainly hope so. It's only been thirty years since those airplanes first flew.
The F-22 is incredibly good at a very small skill set. To me, it's doubtful that we needed to sacrifice so much budget to get the nth degree of capability.
The bottom line is the USAF tried to do too much and mortgaged it's entire future on this aircraft.
There were much better and lower risk alternatives.