Slitherine

When I attack an enemy fighter with my own fighter, the enemy fighter turns directly away from me. It looks kind of silly.

Unless the Devastator I am attacking attacks from the rear gunner? Then, if that's true, all is well.

it all depends on what plane you're attacking, but if it does turn tail, then it is because of a tail gunner firing back

Bombers will turn to use their rear gunner. Fights will face your fighters head on.