Lol. The consent popup on this site is nearly identical to the "dark pattern" example in the Cloudflare Zaraz blog post. No reject all option. You have to click learn more to customize to deny cookies.
Rejects/Hides/Accepts depending on the situation. Not ideal, but hides a lot of these messages.
You can also use the Anoyances filter in uBlock Origin to hide all cookie banners.
Looking now I already have 7/7 Annoyances lists enabled, what filter do you mean exactly?
I use Consent-O-Matic. You can configure how it should behave. By default it'll reject things. For the websites it doesn't support I often use reader mode.