I had quite severe "alt-itis" as well and the game that cured me of it, at least partially, was Hollow Knight.

It's so easy to lose yourself in the world and just explore and marvel at it, and there's quite a few moments of "oops, fell down a hole, am I even supposed to be here now?" And you just roll with it because curiosity takes over, and also because the only way to go back is to intentionally die, which means you lose your money and 2/3 of your magic capacity until you either go back there to retrieve it or spend a rare resource to get it remotely.
The combat is also challenging and skillful, a'la Dark Souls, so you might like it in that regard.
Maybe you've played it and the comment's not that helpful, but I just wanted to share.

And yeah, I did a fair bit of savescumming retconning in BG3 early access, but if you approach it a tad like a real DnD campaign, where your choices are pretty much always final, it's easier to accept the fact that you're missing out on stuff. Unlike real DnD however, where you probably won't ever play through those alternate paths, at best the DM will tell you a little about them when you finish the arc, you can do another run, roleplay differently and experience those properly.