This pattern in which people make claims about Palantir having access to private information, then retreat back to something along the lines of "I don't like the character of the company" is exactly the kind of thing that leads me to believe people don't actually have tangible complaints with the company.
This is true, but Palantir also describes what they do in a way that is going to cause skepticism and confusion. When they talk about the ontology acting as a "digital twin" of the customer environment one could be forgiven for thinking this does actually mean Palantir is exfiltrating customer data and cloning it, which is not what happens.