Can a NCO get in trouble for telling a soldier not to be themselves? And can a soldier get in trouble for disrespecting an NCO?

So, basically you didn't answer anyone who asked for details.

If "being yourself" means not being a professional soldier, then your NCOis legally obligated to inform you to be less you.

Can you get in trouble for...... "blah blah blah" what I said to an NCO?

Hell yes. There's multiple court martials you can research if you don't believe me. You can test it out and say hello to your colleagues while you're in jail, once convicted. God knows there's only a handful of military prisons left open

If the Soldiers conduct is not in concert with good order and discipline the leadership can order that the conduct or behavior that is not in concert with good order and discipline change their behavior.

As for talking back and or disrespect is definatley unauthorized. It sounds as if the military is not for you, you should look to your future somewhere that has no standards of conduct or behavior. I don’t think you will find anything short of maybe behind a computer working from home with no interaction with others. Or you check yourself and come to sone realization that every aspect of life has sone General guidelines or rules associated with personal conduct.

Context is needed.

What does “being yourself” entail?

If being yourself includes being belligerent or bad at your job there could be issues.

If a Solider is talking back and being disrespectful to an NCO they are open to be addressed about that behavior.