Good advice on sitting through the annual review?

First annual review tomorrow with partner at new firm. It's actually not a firm, but a few solo pracs who put their names on letterhead and called themselves a firm.

My partner is the caricature of the narcissistic asshole attorney with zero social skills. His way is the only way and everyone else sucks. But, hey, it's his firm, right?

This is apparently the first time in the firm's 10-year history that they've started doing reviews, so I don't have any historical reference. The prediction is he'll start with some bullshit platitudes like "good team player," "pleasant personality," etc., and then will go on about how much I suck for the next 20 minutes.

I've already been told that I will be asked to give "constructive criticism," but that the partner will do absolutely fuck all about it. You know, 'cause narcissism.

With all of that, any advice? Just sit there, listen to how much I suck, and go on about my day? Or listen to what El Mejor Abogado del Mundo has to say, reflect on it with some humility and objectivity, and try to give some constructive criticism anyway?

Thanks.