There a re a lot of different issues here but they all seem to come back to an autocratic chairman and a compliant strata manager working in cahoots.
What you can do is either organise a coup at a general meeting – get the chairman voted off the EC, or you can persuade the EC to vote him off or, if he is holding a clutch of proxy votes that would make normal democratic procedures redundant, apply to the CTTT for the statutory appointment of a strata manager to take over the running of the building becasue it isn’t being run democratically or in the best interests of the majority of owners..
Assuming the latter option, I would first tell the members of your EC that if they don’t pull the chairman into line, you will apply to the CTTT for a statutory appointment.
But first we need to know if he holds power by virtue of a stack of proxies because that will make a big difference.