What is the hardest thing to beat in Sea of Thieves?

I'm curious, fellow pirate enthusiasts, what do you consider to be the ultimate challenge in the vast and treacherous Sea of Thieves? Is it the relentless pursuit of the Kraken, as its tentacles snake through the waves, seeking to drag your ship and crew to the depths? Or perhaps it's the cunning and ruthless players who seek to steal your hard-earned treasure, making every voyage a test of wits and strategy? Or could it be the relentless storms that rage across the sea, testing the mettle of even the most seasoned sailors? Tell me, what is the hardest thing to beat in this perilous world of piracy?