The Air Force has been trying to kill the A10 since before it flew. They want to fly faster, higher and stealthier, not slow moving ground pounders. At one point it got to where Congress threatened to give the Army their own ground support fixed wing aircraft like the Marines.
There’s nothing wrong with the plane, is there?
They can’t come up with a better design for the mission, right?
It’s just that they don’t like the mission.