Project leaders stay focused on their vision and the process. They aren't trying to make everyone happy. Their own feeling states are not central to their goals. It is the recursive open source process, working through differentiated leadership, which keeps the whole thing focused, productive and honest. Positive criticism can strengthen both working relationships and the project.
Intense criticism is a manifestation of dependency.
Passive-aggressive people only have power when you need their functioning. Don't focus on the content of inappropriate criticism. Step back and take a wider view. This can minimize getting caught up in points that really don't matter. A more process-oriented view reduces anxiety in self, promotes a more realistic contribution to solving problems, and can minimize anxiety within the relationship system.