I've legit seen PM's just move their own deadlines. Their decision, no attempt at justification, and I've seen it put everyone behind because they're waiting o

I've legit seen PM's just move their own deadlines. Their decision, no attempt at justification, and I've seen it put everyone behind because they're waiting on the PM. I've legit seen a PM deliver a set of requirements 3 days before a deadline and blame the technical team for non-delivery (multiple times!). It sounds so ridiculous, and yet ... it happened.