Yeah, I suppose it could have been handled better, hopefully you were smiling politely at the cabin crew, and the cabin crew should have reciprocated with a smile back.

But honestly, this is really extremely trivial, at least to my mind. I certainly wouldn't have the temerity to send in a complaint about it.

Leave it 24 hours, and see how you feel then. If it still rankles, then by all means send something in, but it would be a waste of time, since the cabin crew member will doubtless say - if they remember the incident which is unlikely - "yes but I was totally polite and professional in my dealings".