As JT said, you have to pick your battles.
Picking a fight just to prove you are right wastes energy and just makes the other side more against you.
On the other hand, if the battle is worth fighting, then there is only one person who will lead the charge. Look in a mirror for the answer.
It’s surprising how the threat of mediation will suddenly focus the committee that one is serious. If that fails there is always NCAT.
Also remember, it’s not what one believes is right that the law supports.
Strata living is governed by the act and bylaws. Read these carefully and then decide, is there evidence of a contravention of the act or a bylaw. If the answer is maybe, then the whole process of a hearing will be protracted as each side argues its more right than the other.
I’ve had a couple of instances recently where owners decided to take the OC through the process. In all instances they folded because the law was not on their side.