has a ghost ship that sends nightmares to its captain. some of those nightmares even seem to be warnings, some sort of prescience, of lethal dangers he will face. it's not all powerful, however, and has its downsides which relates to yang yi. the nightmare (name of his ship) will never catch normal fish so he's caught things like 'long-legged sardines' and freaking EYEBALL CREATURES. eating them is safe but loses him some points of sanity. i've rambled but one of yang yi's strengths is his strong will and thus greater resistance against insanity inflicting events. and considering all the cthulu and eldritch abominations dwelling in the deeps, biding their time until the system unleashes them upon unsuspecting captains... well. it's gonna be a fun time reading.

His ghost ship gives him premonitions of the future in his nightmares which is an advantage significant enough that he chooses to keep it when he has an opportunity to swap to a more conventional ship that has better base stats and more attacking potential. He is also able to pretty much ignore the sanity management element of the game which in interactions with other players in chat seems like a big deal. The gross fish he catches and consumes regularly early on deal significant sanity damage to others when he just links a picture in chat. Additionally his low sanity buff is strong, saving his bacon multiple times and it gets even stronger when he unlocks a talent later. His cursed gun is also doing a lot of work for him and it gets a large upgrade later. He also gains an ally in the definitely only slightly unstable witch waifu pretty quickly.

He does have a rough start but to me it was comedic and I'd say as of chapter 34 things are pretty stable for him. The initial difficulty is pretty typical to make his later victories feel more earned. If anything he's more OP than I'd prefer at currently. I do think I have a greater capacity for MC suffering relative to other people based on ratings/review of novels I read but I do think this story is not a very frustrating one.