If you are having a dispute with an admin of a Fandom community, it's important that you try to have an open and respectful discussion with them about the issue to see if you can find common ground.
Fandom believes that each community should be responsible for how it's run, so we do not often get involved in issues within an individual community.
If you and the rest of the community feel that an admin should be removed, and you do not have a bureaucrat willing or able to do it, you can have a community discussion about that and let staff know about the decision. However, that is an extreme case, and should be very rare.
Please see our blogs "Why Staff Don't Remove Bad Admins"and "How to Deal With a Bad Bureaucrat" for more.