A FlyerTalk Posting Legend
Join Date: Sep 2012
Location: SFO
Programs: AC SE MM, BA Gold, SQ Silver, Bonvoy Tit LTG, Hyatt Glob, HH Diamond
Posts: 44,313
Funny, I heard the perspective from an SE on that flight. He said some DYKWIA United Gold refused to not be first on the flight, and was interfering with the boarding process.
I encourage you to write in if you really feel wronged, but for a cavalier in coach, I would expect more humility when you're not allowed to board first.