Also: the consent has to be informed consent. Me clicking away a nag banner, even if I click "accept" isn't informed consent by the definition of the law.

You want to share my data with your 300+ "partners" legally? Good luck informing me about all the ways in which every of those single partners is using my data. If you are unable to inform me I can't give consent, even if I click "Accept all". That is however a you-problem, not a me-problem. If you share my data nontheless you are breaking the law.

A lot of the notices provide exactly the info you need to be informed, it's on you if you want to read it or not.

Undoing whatever data collection and sharing, as well as seeking and obtaining restitution, is probably a much harder problem to solve (for you) if you select accept.