Luke,
As someone who has been observing people for close to six decades, and leading people for 35+ of those years, I will say that if you were my third son, I would tell you how proud I am of how you acted and how you are now thinking about this.
As DGers, we're about the same age, and as a fellow intermediate, I'd say your game improved immensely during that round, and only partly because of how well you shot. Feel fortunate you were confronted with such a sniveling pinhead. What you learned from it, and about yourself, will gird you for encounters yet to come. While I love fellow-Charlottean Ric as much as anybody ("To be The Man, you got to beat The Man"), you would have left a trash-talking, confrontational round with far less takeaway.
Small-minded people belittle others to make their pitiable selves feel bigger. You did the right thing. And when you finished that round, everyone you played with knew it, except the dick, who at some point in his unrewarding life will shrivel to inconsequence.
Jim