I think it might be time for you to take some lessons on communication. Just about everything you post here seems like its sarcastic, dismisdive, or smarmy(such a good word).
There are good ways and bad waysbto communicate with the public, and the difference can often be a single word. You consistently do it badly from what ive seen.
For example. Your entire second paragraph above, just should not exist. You did well with the first, then took the extra time to get hyper defensive and insulting. It was unnecessary.
Your original, have a good one, comment was very abrupt and dismissive. With some rewording it might have been fine.
However, you need to be very careful what you put before an ending like, have a good one, or you just look like you are trying to dismiss what is being said and end the conversation without opporyunity for comback. The equivelent of making sure you have rhe last word before walking away.