I also used to think this way for a very short while a year or so back. I deeply lamented over how much time I had wasted on games and never doing anything 'productive,' like learning a new skill or something. I spent my entire adolescence just playing games over and over, and it was even worse when you considered the fact that I had an insane amount of free-time due to me blowing off almost all of my academic responsibilities (I was in a virtual academy and thus could get away with it). Every single day, of every single week, of every single year, for four years straight, I was just playing games and watching YouTube whenever I wasn't playing anything.
Looking back on it, I think a very large part of that was because I had a really toxic online friendship with this one particular guy who also had nothing to do (because he was a failure in practically every other aspect aside from, ironically, his looks) but constantly hounded me to play something and get into a voice call with him, even when I didn't want to. He would always make me feel incredibly guilty when I tried to ask for time to myself, and expected us to always be doing something together. Despite his incessant whining, he never would bother going out of his way to suggest what we should play nor did he ever show any real passion playing them. He pushed all of that onto me.
Now-a-days, he blames me for his lack of social skills or accomplishments. He's twenty now, and he hasn't done anything with his life nor has any real plan for it going forward. Jesus, even talking about this makes my blood boil... I might just make my own thread on this guy one day, but right now it's just off-topic...
As I said, I eventually realized how much time I had wasted, and I began feeling an unabating sense of dread for a long time. I eventually assured myself that I would just teach myself the things I missed out on, and that everything would be alright after that. That was when, however, I realized just how brutal being low-IQ actually is—there wasn't a single thing I could really teach myself to begin with, nor could I pick up any real skills that mattered. Any efforts I put towards trying to do anything productive was ultimately in vain.
After that, I reflected again on my relationship with games and other forms of entertainment, and I asked myself—what else can I do other than playing video games and watching stuff? I'd certainly consider myself an extrovert, but I really don't like talking with people my age. I don't really 'click' with anyone, so to say. Eventually I realized that there really wasn't anything to do other than what I had already been doing. So I finally stopped being so harsh on myself for what I did during my adolescence.
Still, I ultimately improved how I spent my time with stuff—instead of grinding away on multiplayer games that I will never be good at, I spend my time playing games that actually interest me, like JRPGs and Visual Novels (although, those are recent developments...). I also decided to pick up a few hobbies that interest me, even though I'm unsurprisingly horrible at them all. It still makes me content, though.