Mailchimp Integration pushing but not pulling
To clarify, the following activity on MailChimp is communicated immediately (within several seconds) via WebHook (this does not happen during the push sync):


Any users that unsubscribe themselves in MailChimp will have the Do not email flag set in their CiviCRM Communication Preferences
If a contact is removed from a group in MailChimp, then the contact is also removed from the corresponding group in CiviCRM
A new contact who subscribes directly via MailChimp will be added to CiviCRM as a contact within the corresponding mailing list group(s) that they subscribed to
Changes to contact names in MailChimp will be updated in the corresponding contact record in CiviCRM


If you have completed webhook the steps listed in the documentation, make sure you resubscribe yourself directly on MailChimp first, then:


Verify whether the "Mailchimp: Allow Webhook Posts" permission has been toggled for the Anonymous User role:



  
  Navigate to Administer > Users and Permissions > Permissions (Access Control)
  Click on the "[CMS Name] Access Control" hyperlink (e.g. "Drupal Access Control")
  Use CTRL+F to find "Webhook" > toggle the permission for the Anonymous user role if it is not toggled
  Click the Save button
  



Confirm MailChimp Group Settings:


  
  If using the Membership Sync, toggle the option to "Ensure list's webhook settings are correct at MailChimp when saved" 
  If using the Interest Sync, toggle the option of "Subscribers are able to update this grouping using MailChimp" 
  



If you made any changes to the above settings, test again by removing yourself from a group and/or unsubscribe yourself directly from MailChimp, then navigate to your contact record in CiviCRM (or refresh after a couple of seconds if you are already there):


If you removed yourself from a group, then click on your Groups tab to see that you were removed by API from the corresponding group in Civi
If you unsubscribed yourself entirely, then the DO NOT EMAIL flag should be toggled on your contact record


Hope this helps!