If you believe a player has been toxic in the game or suspect foul-play, you can report them to Xbox Live here. You can also submit a support ticket via Rare Player Support. As this is a matter for Support and not the Forums, I'll be dropping anchor here.

@tesiccl the dolphin dive is from the map/crud cannon launch. It wasn’t a ladder launch but the cannon version, they shoot out, did the exploit and that gives them enough speed from the cannon to jump onto our boat from underwater.

@shinigami-x313 dolphin diving is not bannable if it’s from a great height, but if it’s using the swimming towards the jetty or ladder launching, then that exploit is a big no no.