NCAT will only really be interested if they scheme is functioning in a way that benefits some owners financially to the detriment of others, and the scheme is not functioning as intended by the Act.
To put it another way, if the bullying takes the form of your opinions never being heard but the decision making is relatively sound and the finances and fabric of the building aren’t suffering unduly, they probably won’t do anything.
On the other hand, I hear that even when a building has become dysfunctional due to the behaviour of specific members of the committee – e.g. finances are in trouble, common property is being taken over by individuals without due compensation, maintenance is being neglected to save on levies – NCAT is more likely to appoint a statutory strata manager to take over the running of the building than they are to remove specific members of the committee.