How far would you take this?
I am sure you are a sensible chap and the answer would seem obvious.
If a crewmember was rude to you then you can write to the customer services department at the airline concerned. What will normally happen then is that the letter will be copied to the relevant department manager for action or comment. Depending on the nature of the complaint, the person concerned may be invited to comment and put their side of the story. The matter will then be referred back to customer services and in due course you will probably receive a short reply apologising for whatever inconvenience you experienced on that flight.
Obviously there is no excuse for rudeness, and even though this thread is only one viewpoint, the assumption is events are as you described. Since no criminal act took place, and you don't seem to have suffered any tangible damages, there isn't much else you can do other than complain to the airline concerned. How far they take it, is a matter for them.
If you don't patronise that business as a result of this experience that is your choice and their loss. If you write a letter of complaint, then you will be able to properly express your displeasure. The crewmember will have the opportunity to explain their side of the story to their manager. You should receive an apology. That is about it.