I don't understand this. People who are addicted to games won't play any non-intensive games, like League of Legends (or Which is the lower spec one) or speed chess ?

For me, a big draw of gaming is being part of the zeitgeist. New game comes out, I want to try it, talk about it online, etc. Sometimes my friends get into a game extensively (like COD Warzone) and I don't want to be left behind. If I just had a laptop, it wouldn't be possible to run those games on it. And because I don't have any friends playing League of Legends or participate in online communities talking about, it's not really appealing to me.

How did you go about replacing gaming? I often game mostly out of habit but haven't found anything I'm really jazzed about to replace it

It was though, at first I simply switched to surrogate dopamine dispensers which I ended up blocking, only allowing myself access to certain hours for a limited amount of time. Overall: blocking myself from such activities turned out to work well, can't recommend it to everyone though.

I picked up new things by making an habit out of it, such as reading at least a few pages of a book every day. It's cliché, but setting medium to long-term goals also clarified what I wanted my days to be made of, so now I'm very focused on a personal startup project.

Bonus advice that may not apply to you at all: don't be surprised if relatives tries to keep you from changing your habits, or if you find yourself distancing away from friends, it's a feature of improvement not a bug.