I'm annoyed with obituaries on facebook
Is there anywhere else on Facebook you can look?
I've tried to. A person's death dominates the pages I look at.
If you find social media to be too toxic for you to accept, then you should find other things to occupy your time. The internet is a wealth of other information, and you could also talk to people offline.
No, because my colleagues want to read it.
Even though your colleagues expect you to look at their pages, you need to do what is good for you. You should stay away from social media, if it is upsetting you.