Before we get into details, do you know the level of your enth. you had before the game and if your opponent played and TIE or CT games before yours? And of course GS of your and his players.
Here you did everything right to win the game. His C and SF are very foul-prone players, so choosing Patient was a good move. With Patient, the go-to guy should be much better than his opponents to score more than 50%. Your SF almost succeeded and not because he is that much better, but because his SF has bad defense and is foul prone.
You chose a slow tactic and so did he. This let you keep the point difference at minimum (this is very important). Since you are more defense oriented, this helped you a lot.
His outside players can't match his inside players; the team is not balanced. Result: his inside players shot 17-28 combined, while PG and SG shot 8-38 combined.
His PF probably has bad HA, turning the ball over 6 times (17 TO for the team) and letting you have more possessions and score more, of course.
He overplayed his three outside players and it showed in OT.
I think there are quite some reasons for your win!
