(Cambridge Dictionary) in your face used to describe something done in a forceful way that intends to shock people
This sort of reaction is really characterized as vindictiveness.
(Cambridge Dictionary) vindictive adjective disapproving
having or showing a wish to harm someone because you think that they harmed you; unwilling to forgive
- Person B then feels vindictive.
If you do not want this revengeful attitude, while still keeping that of satisfaction and vindication (but not triumph) you can use "rehabilitated".
(SOED) rehabilitate 2a Restore to a previous condition; set up again in proper condition.
(The Crystal Pyramid) Now William was certain he was not mad. He had been right to search for his father and he knew deep within his being that he would continue to do so, until only his death stopped him.
Suddenly he felt rehabilitated, and although still confused about his father's disapppearance, he was not mad. There was a proof he had been searching for and now he was positive his father was real.
(70 Greatest Love Stories in Fiction (Historical Novels Edition)
Charlotte Brontë, Anne Brontë, Emily Brontë · 2023) His book-case somehow transported him back to the days when he had thought of better things for himself, and when life had held an ideal for him. Perhaps at the best of times it had never been a very high ideal; but when a man is over fifty and has given up doing anything but struggle through each day as it comes, and gets out of his work as best he may, doing what he must, leaving undone what he can, any ideal almost seems something higher than himself; but the recollection of what he had meant to be, came back to him strongly when he looked at his carved oak.It had not been carried out; but still he felt rehabilitated and better in his own opinion as he stood beside this costly purchase he had made, and felt that it changed his room and all his surroundings. It might have been almost wicked to run into such extravagance, but yet it did him good.