It's not a problem that can meaningfully be dealt with on an individual level.
I recommend Johann Hari's book Stolen Focus. It goes deep into influencing factors of why we are having such a hard time of putting our devices down. The first he lists: giant tech companies are employing the smartest people on earth (i.e., smarter than you or me) to maximize engagement. The cards are heavily stacked against any single one of us trying to break free from these skinner boxes. The threat of social isolation you mock the blog's author for is of course another ace up Meta's sleeve. The book among other things tries to relieve the feeling of individual failure at this insurmountable task of constantly fending off the targeted attacks on our attention- I paraphrase: "You didn't fail, it was a losing battle to begin with."
If you yourself don't have this problem, I'm glad for you and I hope it lasts. Many, many people do, and there are ever more tragic news headlines to show for it. We as a society (or is that societies?) need to regulate the tech-oligarchs, and fast. I have some hope left at least for the EU coming around on it.
Of course, everybody is trying to develop tricks like yours to resist, but I don't think we should just accept as fact that we need to have those tricks to escape the attention grabbing behemoths with the endless money they throw at this optimisation problem.
It's not like algorithms designed to maximise engagement regardless of societal cost are a law of nature we can never escape. It's just unregulated power, which society has worked very hard to limit and align with "the common good" in the past. Free reign for technocrats that display beauty ads to teenage girls after they deleted their selfies, as a single heinous example, is proof that our control mechanism (democracy in the broader sense, I suppose) isn't working anymore, but that also doesn't mean we should roll over and accept it.
I'm with you that personal responsibility is of course important. The message of Johann Hari's book I tried to convey was (paraphrasing again) "Don't be too hard on yourself when you eventually slip up. It's a steep uphill battle."