There will be many people in your life to whom you most likely will need to show respect, a rov, a boss, your spouse etc, at times when perhaps you feels they do not seem to deserve it. Your rov gave you a p’sak you didn’t like, your boss ragged on you for not meeting deadline on time, your spouse picks a fight with you. How do you react. How do you deal with each individual situation? You may NEVER show disrespect to your rov. You would be foolish (and maybe taking your future in your hands) to show disrespect to your boss. Ditto, for your spouse.
So when it comes to your parents who D’Oraisah oblige you to ACT WITH RESPECT in dealing with them, remind yourself that just as you would not tell your boss off, kal v’chomer you need to watch yourself in relating with your parents.