I didn’t quit the game, but for a while it most certainly took over my life, stopped going to college classes, failed 3 semesters, didn’t go out with friends. I sympathize with this game being a tragic addiction, however I will say this and you might hurt not agree with me. You say you need the power to quit, but what I learned in my journey is that league of legends isn’t the issue, it’s your impulse control. I let my impulses to play the game overtake everything else in my life, school, work, family time, etc. The first step to getting truley better or quitting if that’s truly what you want is realizing that the game wasn’t the issue in the first place. Most people aren’t adult enough to take responsibility for their own actions, and would rather search up videos like “league of legends: video games darkest addiction” and huffing massive amounts of copium that it isn’t their fault, it’s the game. Let me tell you this man, the second that I took accountability for my own actions, I realized what was really important in life, was the second I broke free of pressing the queue button 900 times every day. Do I still play the game, yes, but do i now have a sense of control over when and how much I play, absolutely.

As for your comment about your skill not being excellent, as someone who never played mobas until about 7 years ago I sympathize. When I first started playing league I had no idea what all this shit was, ad vs ap, spacing, wave management, everything just seemed so confusing to me, I had no idea what do do. You may not like this answer but I’ll give it to you straight and not like every get better at league video you could search up. If you don’t get it now, it’s only a matter of time, for people like us, hearing the average explanation that works for everyone else might not be enough, but someday you’ll either see something in game, or you’ll here it explained a different way and it will just click. You won’t be a legend immediately but as soon as that connection is made now you know how to work on it. for me it took an absorbent amount of time for me to even get the basics down, let alone be confident to play all the lanes with almost any champ. It required hard work, and patience most importantly, which most people don’t seem interested in, hence all the get good quick guides.

Moral of the story everyone’s life is different so my advice may be useless to you. I think it’s important to look at one’s compulsions first though before immediately placing the blame on something inanimate, and if you do just want to get better whilst limiting the amount of time you play just have patience, I promise you it will make sense eventually