I'm really sorry you had such a crappy experience with that driver. You weren't in the wrong at all, he was, but it does a number on your confidence.
Maybe it'll cheer you up that my sister - she can be a bit petty - basically did what you did, but on purpose, just to give the tailgater a nice greeting: she braked and waited for a good minute before driving on and then letting him pass, at high speed. Little did he know he was driving straight into a speed trap
Bet he wished for more patience after.