Have you ever been evaluated for ADHD? I'm not a specialist, nor does your post have anywhere near enough info for me to judge, but your second to last paragraph especially sent up some flags for me so I thought I'd mention it
Many ADHD drugs work by (more or less) increasing dopamine levels in the brain. This makes regular activity more rewarding, and lessens that steep "cliff" effect. For me at least, it allows me to indulge in activities like video games and other hobbies in moderation which was never possible before (in addition to a lot of other quality of life benefits).
Medication isn't the only answer of course. There are treatment and management strategies that don't involve drugs, and I often find that just understanding the mechanisms behind my behavior helps me come up with effective strategies to manage them.
(And of course, not all video game addictions are ADHD related, and I absolutely don't mean to suggest they are. But there are well documented links between ADHD and addictive behavior. And ADHD is widely misunderstood by the public, so many individuals that don't display classic hyperactive symptoms aren't diagnosed or are diagnosed late in life. So I thought it'd be worth mentioning as something to consider anyway)
I'm a kind of functional member of society, a bit introverted yes, but I'm able to do everything more or less normally. Some social anxiety, but I'm able to overcome it when I really need to, I can work and function normally and honestly I wouldn't like to take drugs or treatment if I don't need to. If I had ADHD it might be a very mild case.