I'm not sure if this happens to everybody or only some, but it happens to me and I've seen it in a lot of YouTube videos as well: LEGO Island 2 says "High Detail" is on by default, but it might not actually be on. To make sure high detail is on, you need to go into the options, turn it off, and on again. If everything is suddenly sharper, and you've never tried this before, congrats, you've been playing LEGO Island 2 with textures downscaled for your entire life. And you'll have to do that ever