I quite understand wanting to quit social media, and also trying to get away from YouTube addiction because there's such a lot of rubbish to wade through to find anything worthwhile. Discussion forums can also be addictive and repetitive. And sometimes quite unkind.
I don't subscribe to Amazon prime or Netflix or any other online streaming service. And I don't play video games.
But I could not do without email for ordinary communication for business and stuff, and also internet banking. I have family all over the world and WhatsApp is a brilliant way to keep in touch -- instant and free communication with anyone, anywhere in the world. To me that's a beneficial facet of the 21st Century.