Tom only gained from the perspective of Tom, and likely only in the short term. So I'm not specifically sure he won, other than he ended the show reasonably happy, but he's not in a position Ken/Roman at least, particularly wanted, and Shiv only wanted out of desperation.
And isn't he only in that position due to the President elect asking for specifics, who's not actually President elect... so it's gonna be even shorter term that expected anyway. I mean I'd love to fail upwards like Tom, not gonna lie... but I wouldn't want to be where he is if I was one of the siblings, even Shiv, but she's shameless.
Matsson "won".