[User23]

Based on what you’ve said, you should be looking for an internal transfer yesterday.

I’ve seen this before and virtually always one or more ICs get to be fall guy before a bad manager faces consequences.

More generally, building relationships with other hiring managers at your company is generally a very good practice. This is best done by being a visible contributor to their team’s success. Usually that’s because your team is somewhere in their dependencies and you stand out as someone who delivers.