Hey @seekjesusgrow thanks for reaching out.
Menus are set in Appearance > Menus and may be impacted by your theme or other plugins. You should be able to remove the menu item though likely need to deactivate the Disable Blog plugin first. Disable Blog will hide options but does not change content like Menus
If your theme or some other plugin are auto-populating that menu with categories then you’d need to reach out to those developers/resources to debug further.
I’m closing this topic after no response, but please feel free to re-open or reach out if there are any additional issues.