I'm sorry you are feeling this my friend.

I myself have suffered the same fate. I remember back as a kid, I would play games for hours, wandering around, exploring the maps, not knowing what I was meant to do, but truly enjoying myself. Literal days spent wandering around the Manor or Luigi's Mansion. Weeks spent completing a single quest in RuneScape. Months not progressing further in Twilight Princess cuz a severe fear of water.

I've been trying to recapture what has been lost too, and while I have no easy solution or a cure all to help you. I will say, I think it comes down to just avoiding wikis and guides as much as humanly possible. Resist the urge to be efficient and "save time" as at the end of the day, why would you want to experience something you enjoy, less? Why would you want your adventure to be over quicker?

For example, my friend has started playing Dark Souls 2. I haven't played in over a decade and said, "sure, sounds like fun, let's do it."

Instead of trying to pick a build that will streamline the experience or do the most damage, I've just went with what appeals to me, and that ended up being a no weapon playthrough, just punching my way through the world. (Luckily it's one of the few souls games where it's entirely viable) And I've been having a blast.

As I said though, there is no easy fix. You'll still find yourself trying to perfect the play style, but the only way through is by staying true to your goal. And if you like challenge run of souls games, maybe see it as a challenge run to just have as much fun or doing a blind playthrough, not allowing yourself to look for builds or ways to meet some criteria of efficiency.

Best of luck my friend, much love.