> Safety Check is a wonderful feature. If I remember correctly, it started off as an internal hackathon project that got turned into a full feature. They get shit if they turn it on (here), and if they don't turn it on (past tragedies where they failed to turn it on).
It's just not the same people doing the complaining. That some people complained about the feature not being on doesn't mean there are no negatives to turning it on, and now people affected by those negatives are complaining.
Or to draw a more absurdist comparison, let's say Facebook had a switch. If they pull it, I get punched in the face. If they don't pull it, you get punched in the face. Now, when they pull it, I'm understandably upset and demand they stop pulling it. When they listen to my complaint and stop pulling it, you are suddenly upset and tell them to keep pulling it. Seems like Facebook just can't catch a break? Or are they simply trying to serve customers with competing needs, something every business has to deal with?
I don't think this situation is special to Facebook, so I think a likely explanation for your initial question(Why does everything Facebook do have to be so heavily criticized?) would be that this is something common to large businesses trying to serve competing interests, and you notice Facebook more because Facebook is very large and has lots of users.