You were probably very close to a question-ban when you asked. Your profile shows a lot of questions from last year with negative scores, and there may be more that you deleted that aren't shown. I don't know if 8 or 10 upvotes outweigh 2 or 3 downvotes on a question, though I would expect them to. But perhaps not.
It's also possible that when you asked the latest question, one or more people looked at your old questions -- this latest one looks like it was pasted in from elsewhere and a person might wonder if you did that a lot, or if you tended to take the time to make up questions with nice diagrams. If that resulted in some more downvotes for your older bad questions, whatever the calculation is for the ban might now be "nope, too much bad stuff" not just from the new question, but from the old ones too.
Either way, fix (don't delete) the old things. If there are comments saying what the issue is, address them. Your edits will bump the questions, upvotes may ensue (the giant list of "posts that need upvotes" in your profile is really not the way to do it) and your ban may lift. None of us know for sure. I'm just speculating based on experience.