I still don’t think that someone who is a nominee for a building can claim to carry the votes of everyone in that building. Even if they are the “proxy” there is a limit to the number of proxies any one person can hold.
Sounds like you have a mess there and the strata manager is not helping. If the strata manager wasn’t allowed to see the minutes, they should never have allowed the veto.
A trip to NCAT may be in order, to get it sorted out. One owner can’t be given a veto on all motions proposed at a community association. Maybe you need a new strata manager too.