I agree, as well. Doesn't sound like you have an acronym issue.
Whether your group is a PTA or a PTO, you'll struggle, if you have a principal who doesn't respect the role of the parent group and leaders who aren't open and welcoming.
Sounds like you need to address those issues first. Can you find a group of like-minded folks at school who see the need for change and are willing to work with you over time to transform your group? Can you educate your principal on why an empowered parent group can make him or her look better and the school more effective?
If you can start making those changes, then -- if you're still getting no help/value from your affiliation -- it would make sense to explore your options.
But before that you'll just be rearranging the deck chairs of the Titanic.
Tim
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