I wouldn’t feel comfortable in a shul where women are leading kabalas shabbos. I’d feel a lot less comfortable saying that a breach of tznius or kavod hatzibur is worse than a breach of halacha.
You’d be correct. A breach of halacha is much worse.
But my problem is not the breach of tznius. My problem is the shitta that he has the ability and right to decide that the rabbonim of thousands of years were wrong about something. He is making up his own religion.