So the first email was from a Protonmail account, and the second one was spoofed and obviously had incorrect headers. Are you saying Youtube doesn't check for these when processing take-down requests?
What incentive does Youtube have to get this right? They have a major disincentive to ever push back on the content cartels because even one false negative could put them on the hook for trillions of dollars worth of damages, even if it was due to sloppy work on the cartel's part. It is no skin off of Google's back if they take their cut of the revenue from the wrong person, it's all the same to them.
The only way to get Google to care would be for content creators to start abandoning the platform on mass, but they don't really have anywhere to go (sorry Vimeo). Even then Google views content creators as a dime a dozen, so to get the numbers you need to make them notice would be exceptional.