This sim/game is no different than a chess game. Regardless of which piece you are, something else can trump you.
So when a tank shoots and destroys a FLAK/M16 and not another tank, is it cheap?
When in bombers take a fighter escort. When in a tank take an FLAK/M16 buddy. Regardless of which piece you are, you can be trumped.
Fighters (light) are no good vs tanks (perhaps minimally, but more of a nuisance). Bombers are not good at air to air ventures. Ground attack aircraft, while heavy, are not good at air to air generally speaking. Tanks are good at destroying ground targets, but are hardly worth mentioning when dealing with air threats. Etc Etc Etc....
... back to the game.