If you have evidence of mass reporting or other forms of harassment on Twitter, you can report it to Twitter's support team. They have a dedicated team that investigates reports of abusive behavior on the platform.
To report the issue, you can go to Twitter's Help Center and select the "Report abusive behavior" option. From there, you can provide details about the situation and any evidence you have, such as screenshots or links to the targeted accounts.
It's important to remember that harassment and abuse are not acceptable behaviors on social media platforms, and it's important to take action to address these issues. I hope this helps!