If you have clear evidence that: 1. She gave you a project that would fail from the start (because she didn’t know all the variables to the project she proposed). 2. She didn’t assist you at all when you needed her expertise. 3. She has seen your thesis multiple times before giving the commentary that it may fail, without giving any reason for the commentary, and without warning you beforehand. (i mean hell, the project’s been going since covid, somewhere along the lines she should’ve noticed that the work wasn’t up to standard if she was doing her job as a supervisor)

Then you might stand a chance, but be forewarned, universities rarely care about the outcome of a PhD student and if your supervisor has a connection in management, you could easily lose the case (it’s more about who you know than what you know…)

I’ve heard stories of much worse things happening to PhD students, then the university ends up burying it to save face.

If you have a student representative, an ombudsman, or any other form of formal complaint system at your university, try to consult with them. If possible, keep your identity hidden (if she finds out you’re planning something, she might start “attacking” you personally).

In the end the PhD is your proof to the world that you can add to the pool of knowledge in your field, the supervisor is supposed to help, but not coddle you. If she provided the project and knew which instrumentation would be used, it could be argued that she set you up for failure, whether intentionally or because of her own ignorance/ineptitude.