> If you've seen most other consent forms, rejecting cookies (if possible at all) is usually done via a small link next to a prominent "Accept all" button and other such dark patterns.

That's exactly how this one works for me. The prominent "Continue to site" is "Accept all" in disguise, and to opt out you need to click on the little "Preferences" button/link. It's the same dark pattern as usual, not a UX improvement.