Thanks for the feedback, everyone.
I wanted to mention that at the moment the content is more spread out and less linear, but I plan to develop the story. I've always planned to develop the storylines more and have a strong central storyline. The UI and navigation will be smoothed out soon as well. But for this first release, I wanted to focus as much on varied content as possible. I'm still learning a lot and trying new things.
If you don't like the sandbox genre itself, I can't do anything about that. But if you dislike it because of previous developers, I'd suggest trying my game after a few updates. The story elements in my game will be much more developed than other sandbox games.