Everyone else replying to you is trying to convince you with arguments that reddit isn't a good use of your time. As you already know, this won't work. You're already convinced.
The only thing that works is a site blocker. It actually works. Convince yourself that the block is permanent. Delete the app. This of course won't completely stop you, because you could always unblock yourself. But it'll stop you from mindlessly pulling up reddit.
If you can't control your reddit consumption already I'd expect that the site blocker will end up disabled before long. I'd try to involve a therapist if the goal is getting to the bottom of this beyond even reddit or websites in general.
Sometimes a simple "pattern interrupt" can break the cycle. If you've a habit of opening the page whenever you hop on your phone, that extra effort may be enough to push back against the potential incentive
Anecdotally, a lot of digital addictions come down to ease of access vs dopamine hit. As soon as your access method is "futz with a hosts file" or "ask your wife to unlock the blocker" (I was pretty bad), it becomes easier to break the cycle.
More people need to utilise their tendency toward lazyness, I swear
Start a habit tracker tracking # of days not browsed reddit. you can trick your brain, since it loves streaks. also tie it to some reward mechanism so it seems like you're earning something by not browsing vs a punishment.
The only thing that works is a site blocker. It actually works. Convince yourself that the block is permanent. Delete the app. This of course won't completely stop you, because you could always unblock yourself. But it'll stop you from mindlessly pulling up reddit.