When a publisher refuses to remove a negative post, you aren't out of options....

https://telegra.ph/The-Art-of-the-Correction-How-to-Safely-Approach-Site-Owners-About-Negative-Content-03-22

When a publisher refuses to remove a negative post, you aren't out of options. You can still take control of your search presence by leveraging Google’s Remove Outdated Content tool to scrub broken links or cached snippets