As I was posting this, things seem to have suddenly changed on their own.
All that stuff is still invisible, however, now the reply box is gone, and it just says “Comments are closed,” even though I disabled the widget so it shouldn’t even say anything about comments in the first place. However, the widget still exists on the post I had made BEFORE these changes happened by themselves, so on the first post comments still are available and I can’t get rid of them, and on the second post it says “comments are closed.” Um, okay.
It occurs to me that I’ve also deleted the search bar and the text box widgets, however, they still exist on every post and are unremovable and uneditable. This is an absolute disaster.