I’ve been in the same boat, so i got myself a cheap phone (actually a hand-me-down from my mom in the form of a Redmi 6A lol), flashed lineageos and didn’t install gapps. Basically as dumb as a smartphone gets. Then you get fdroid and aurora store and you’re good to go. However, i use that phone only when i need to focus, so about 5-6 hours a day, so unfortunately i still have a smartphone. So maybe it would be worth it for you to look into that sorta thing, definitely has helped me regain control.
I’ve been in the same boat, so i got myself a cheap phone (actually a hand-me-down from my mom in the form of a Redmi 6A lol), flashed lineageos and didn’t install gapps. Basically as dumb as a smartphone gets. Then you get fdroid and aurora store and you’re good to go. However, i use that phone only when i need to focus, so about 5-6 hours a day, so unfortunately i still have a smartphone. So maybe it would be worth it for you to look into that sorta thing, definitely has helped me regain control.