The weekly report from Digital Wellbeing on my phone informs me that the daily average screen time was 20 minutes less than last week’s. And I am pleased to see that trend has been downwards for the last few weeks. I uninstalled YouTube from my phone a few weeks back, which is one of the key reasons for lowered usage.
YouTube sucks away time without you noticing. The best way I know to control this beast is to not be available to you. The web app is a pain enough to not be distracting. So just get rid of the app from the phone and get your time back.