I feel the exact same way, except that id recommend it for many of the things you've criticized it for. The gameplay loop is pretty unique, and the build up to cooking every night implements a level of strategy to the preparations you have to make leading up to it including what fish to catch and how you invest your money.

The game feels all over the place, but in a really good way. It's not just a repetitive, "fish, cook, repeat". There's a million random ass things that get thrown into the mix which is a complete 180 compared to most games made now. It's good because it doesn't really follow the traditional rogue-lite formula that we've come to know. It gives off the feel that the developers created the core game, (fish, cook, repeat) and then along the way took a bunch of, "wouldn't it be cool if we did x" idea they had and threw it in there to mix the game up. It's a super nice game to play while relaxing as the stakes are low, the story doesn't require immense focus to follow, and you're ultimately just fucking around under water as on overweight diver named Dave.

It feels a lot like a game made for those that don't play many games, and I think that's why it's doing so well.