The image is a reddit post with the following text (automatically transcribed):
I remember I got into an argument on reddit awhile ago with a person over Italian food. It got to the point they were following me into other subs to harass me. I clicked on their profile to block them and their most recent post was them drinking their own piss on r/piss. At that moment I realized I had spent so much pointless time arguing about the taste of food with someone who drinks their own piss as a hobby. This site is a shit hole.
I don’t think you really the point of this thing.
The point is people are free to join the instances and communities they care to see, and if it’s that piss, puss, and blood, they’re welcome to it.
And if the instance is regularly showing you stuff you don’t want, you can join one that doesn’t, or even make your own and cut it out yourself.