you don't even need to be mashing an attack button like that to tech. you can press a single button to tech if you decide you want to tech. if you get hit by something small, airhit 5a and think you might be able to tech, you could press a or b, you could also hold a button until you tech and then barrier. there's other stuff you can do. by always putting out a hitbox after you air tech you're seriously restricting your options.
Are you sure you aren't just addicted to the really big random rewards. even if they are uncommon.