a lot of users (including me) are getting very upset about that addition

here’s the feedback page for the new feed (mostly negative): https://github.com/github/feedback/discussions/categories/feed-feedback?discussions_q=category%3A%22Feed+Feedback%22+sort%3Atop

users have already created a Chrome extension that disables the feed: https://chrome.google.com/webstore/detail/disable-githubs-social-fe/kpnlfpcahnaneiphpmhagjodkonmkkfj