Your recaptcha is ridiculous. I had to go through at least 9 screens to access my email today. Of course, I also had to approve my sign-in with a mobile phone alert, as well. Security should not require both of those in addition to a password. I am ready to switch completely to gmail - after using yahoo for decades.
For any account or sign in issues, please contact our Customer Care team at help.yahoo.com. They handle issues with logging into your account and take general feedback. We can help with issues in the product itself. Thanks.