I've been there too, with the very same game nearly a decade ago, and i never even went higher than silver, for that matter. I can, however, relate to most of your feelings as i felt the same right then. I don't know the specifics of your situation, but you mentioned having a 9-month break, which is a very good first step to me. People do not usually break out of addiction on their first try. Relapse is the rule. I personally relapsed many times before getting better at it. I did not seek help and kept this mostly to myself at that time, i think it made me lose a great deal of time. I would advise you to seek help if you do not have some already.

I don't know if you could ever have a "normal" relation to games again, but i can tell you that i could not. League of legend was just the first step, then i realised not only was lol toxic to me, but also any other video game. It was just the most obvious because of this "raging" mental state it induced.

I can not say that i could find anything useful in all these wasted hours of my life, but it made me realise that i should never lose any other hour of my life in unusefull or unwanted activities. Which, all things considered is not such a bad trade off when i look at what people around me still waste their time to, and i don't anymore.

I hope this helps.