A great Lichess feature is that you can turn off ratings completely in settings, for the whole site. They're still used for matchmaking but kept completely hidden. Far better experience.
I think this is called “Zen mode” for those trying to find it.
I’ve had it active and it’s a good psychological edge. You should always just play the pieces coming at you and not think, "wow, this person’s 250 points better than me, I should expect to lose and play for a draw", but by hiding ratings you don’t introduce any chance to think like that.
Site Settings only appears on the website, for Lichess app users like me who couldn't find it. But once you change the setting there it will apply in the mobile app if you're logged in.
I like this setting, but it makes the home page look barren to me. It totally removes the central block showing the leaderboard and tournament winners, becuase they contain ratings.