Find hobbies to help get you excited about things and less bored. If nothing appeals to you, you might have clinical depression

There is no cure, the treatment is distractions. Reducing the symptoms may cause the issue to resolve temporarily.

That sounds like anhedonia which is a major symptom of depression. You should consider seeking help.

Regular sleep, exercise and reaching out to others who care about you can all help outside of professionals though.

No. I have effectively defeated boredom.

Never in history has the average person (caveat: I live in a developed nation) had access to so many varied hobbies and forms of entertainment.

A more significant struggle is finding meaning. I have succeeded there too, but it is more of a challenge.

My cure:

1. Take a walk every day. No headphones or music, just take a walk through your neighborhood, nature if it's nearby or anything. Aim for an hour each day, at least 30 minutes.
2. Look for non-screen hobbies, or at least non social media hobbies. Things like drawing, writing, making music, woodworking, 3d printing Warhammer, or even reading books. Don't beat yourself up if you don't work on your hobbies a lot though.

Besides this I hear people being positive about journaling, but I've never tried it.

My cure is to try new hobbies/activities. Especially ones that require your complete focus. Like Motorsports. Personally I have a lot of anxiety when it comes to singing in front of people, resulting in everything else disappearing during the vocal lessons I for some reason signed up for.

It used to make me sad that I couldn't hold a single hobby, but I guess I'm just not built for it. Trying different ones as often as needed is more up my alley

You need hobbies

The cure is doing something that benefits someone else. Hedonism is inherently boring.

No.

Wtf even is the cure?

It isn't cringe posting on lemmy, or you'd be cured by now.

Unironically, be bored more. If you are so tweaked out by the constant stimulation of modern life that even the deluge of content can't suffice, your brain has been broken. Meditate. Read. Listen to the sound of your breath. You will want to do something else. Do not do something else. Teach your brain to live at the speed of life.