Well, overall, it should have been an easy win for B… at mid game, you were 15-20 points behind because you waited too long to invade… see my review.
Ultimately, you did In fact, you have opportunity to win easily yourself, by simply not being greed at move 138… if you just ensure your connection and penetrate as much as allowed, and at move 181 (I think) where you mis-read and should have captured to save your group…