I started doing that in general several years ago. I now regularly cull anything from my life that I identify as a source of negativity. For me it's mainly relationships with people that end up generating high levels of negativity and I suppose Reddit does count as that. It was one of the first things to go. I deleted my accounts and the app and went completely cold turkey. I have more recently reintroduced it but more carefully, sticking to a few choice subreddits.