[DonRotolo]

To your point about How? - your local FIRST Senior Mentor can help, a lot. Get in touch with them.

As not only a reasonable and knowledgeable adult, but as one very famiiar with team dynamics, they can spot, call out, and recommend solutions to problems. Adults tend to at least listen to other adults, even if there is no respect for students.

Yes, you and your team are in a difficult situation. Get experienced help.