"Why are most my questions reported and deleted?" - The assumption would be, because the users reporting them feel they are violations. Without being able to ask the users doing the reporting, that's a 'best guess'.
You can appeal wrongful content removal here:
https://io.help.yahoo.com/contact/index?page=topics&locale=en_US&y=PROD_ANSW
and include - The specific text of the post that was deleted, The violation reason specified in the notification email (if you got one, if you didn’t get one then make that known), The reason why you'd like it reviewed, and The Yahoo ID you're using in Yahoo Answers.