Being Rude Gets You Nowhere
Being a pain in the you-know-what does not get you anywhere in life. And it surely doesn’t help while flying. Even if there is a flight upgrade available, flight attendants will not give it to you. You already knew that, though. You probably didn’t know the next part.
If you are a frequent flyer, it will be noted on your account you are troublesome. Just like getting a bad mark in school, you’ll be considered a bad flyer regardless of how many flights you book! Do you want an A in flying or an F?