Yeah but you didn't mention that he didn't play 3 of his usual starters, played a bunch of players worse than your starters, and you CT'd him when he played TIE.
There are always various factors involved in games other than tactics.
My team on paper looks strong inside because of my heavy big man presence, but my shooters are equally adept. Playing 2-3 against me when I play PTB would be suicide.
If I want to shut down a big man or shooter, I play M2M and play my best defender on him, that way I'm guaranteed to have him man marked at all times by that player. A zone shifts too much and I may find my weakest player in that zone marking him.
There's nothing wrong with 2-3 if a team has horrible guards, but if they're competent they can really rip you a new one, because instead of looking inside they'll start creating their own looks.