Did you remove the browsers and app store as well? I got rid of everything except for phone/texting, Slack (for work), and non-bingy convenience apps like Maps/Yelp/etc. On Android, it can be done with the adb shell without rooting, even the 'uninstallable' apps like Google search and the Samsung browser. Not sure about Apple.
I tried this before without getting rid of the Play Store and found that I would just cheat and download FF Focus when I felt like binging and then deleting it again when I was done. Now if I think I need a new app, I actually have to go on my laptop, download the apk, and move it to my phone to install it. It's not foolproof but it's enough extra steps to where I don't act on it on impulse.
It's worked really well and I don't binge like I used to . I still have some compulsive phone-checking habits but it's way less time consuming than compulsive-random-article-reading/scrolling. And I also get to keep the nicer benefits like the good camera and the large screen for when I need a GPS.