When I want to post a question, I faced this page. I went through deeper, I recommended that I should edit my previous questions by checking all of them and make them better. I was shocked. My direct feeling is "不教而诛". If my questions were not good enough, they should not be posted in the first place. They should be returned to the user, recommend the "not good enough" parts to be edited, ... etc. Instead, they are posted, and after a while, you are punished because they are not "good enough". I am not questioning the principle itself, I like it because this is a way to maintain the quality standard. Excellent. I am questioning the "standard" of this policy. "Who" decided? Wouldn't it be fair that the standard should be known to the users before they post a question?
To help maintain quality (and reduce user time spent on curation), Stack Exchange has both a question ban and an answer ban. In this case, I think you've hit the question ban. (Your questions are listed here.) This is an automatic process (i.e., there's no human directly involved), and only Stack Exchange staff knows the precise algorithm.
Wouldn't it be fair that the standard should be known to the users before they post a question?
It's not straightforward to automatically pinpoint a single problem before posting (I'm not even sure this would be possible, e.g. there might be multiple overlapping problems). I surmise that the question ban takes into account all of the user's questions, as suggested by the advice:
Edit all of your questions, paying special attention to those that score 0 or less.
and it likely treats downvotes, closed, and deleted questions as negatives (along with other features we're unaware of).
In general, well-received questions here tend to identify something specific the OP wants to learn about the Chinese language. By reading the answers we learn something, and good questions attract such answers.