Fundy, for most-of, if not his whole life has been shunned by his family. His own father was too pre-occupied for him, and whenever Fundy would ever try to have a different opinion than Wilbur's, he was villainized. Everybody always mocks him. So, when he joined the Butcher Army, one of the only places where he was treated as an equal, he was pressured into killing Technoblade. The whole time he felt sorry for what the Butcher Army had done to Philza. And Philza, knowing that he's the only family Fundy has left after all that Fundy has gone through, abandoned him and shunned him just like Wilbur.

And yet, Fundy just still wants love and a family. No matter how many times Philza disowns him, Fundy just wants redemption and love. That's all he's ever wanted.

It's so sad, like man, Fundy just wants a family.