How does HOA remove their draconian board of directors?

How does one go about getting a board removed. They rule by threats. If you don't agree or ask questions you are sued. We have a 85 unit complex and a board who has been in office for 10 plus years. I need a step by step process. we now have about 10 owners who will talk but need an attorney, Owners are afraid. When work is done on complex same "contractors" they take over owners condos without permission. In the past owners have gotten fed up and just sold!