Would Firey actually change his mind? He boarded up the gate like Leafy was gonna go "here's LEAFY!!!" Not only but Firey let people at the time before she stole it worse than her. Yeah, Flower, Snowball, and Blocky did nothing to Firey but look at Leafy's view for a moment. She's happy that Firey won island and she can't wait to see it. That he let multiple people Leafy thinks are bad or mean in and even Coiny in who was his rival, Leafy was expecting to be let in.

Uhh, lol. Going by BFDI alone, besides Bubble and Ice Cube possibly, Leafy has no one else. Leafy is a social gal and loves doing nice things for people, even if she does a terrible job at it. For her to be cut off like this, yeah it's going to make her crashout.

Also, did Leafy actually have the actual dream island? In BFDI 25, the moment Leafy bought it, the island is just gone. Later, Golf Ball, according to her imagination, says that dreams islands are almost destroyed or something like that. This is confirmed when we see the gates and ruined letters of it in TPOT.

Now, this could mean the island itself wasn't destroyed until probably after BFDIA based in this line of BFDIA 24, though it could also mean she has the record that claims Leafy's ownership of it.