Earlier quoted context omitted.
Which plane, exactly, is superior to the F-35?
Pretty much anything from the last generation. Embarrassingly the F-16 beat it in combat, for example. For close air support the A-10 is vastly superior. The F-35 is an employment program like the TSA.
Vastly superior for providing CAS in uncontested airspace against enemies that struggle to acquire MANPADS, let alone a modern air defense network or their own air force, perhaps.
But the argument is that the US military should be designed for fighting the biggest plausible enemy, and that's Russia or China, not goat herders in Afghanistan. A major inefficiency in counterinsurgent air support is expensive and survivable, using A-10s against a major threat isn't.