Legitimate interest does not exist and is a loophole in the law which should be killed. You can challenge it but the authorities who should handle that are grossly underfunded.
Most of EU laws are "these are sensible defaults and we expect you to behave like adults". As we've seen, digital services are anything but.
They're not even pretending anymore and are just trying everything they can't get consent for again via the "legitimate interest" route.
I was actually wondering if the mandated "refuse everything" button that revokes my consent in bulk (and then conveniently closes the window) also implies I objected to all "legitimate interest" claims, or if that is another malicious compliance trick...
Or, if reforms do pass, they get reversed the next time the counter-party gains enough power in Congress to roll back the progress.