It's somewhat easier to just browse in Firefox's private mode all the time with trakingprotection enabled and no 3rd party cookies. Nothing is shared with the tracking networks and any cookie set by the site itself is deleted at the end of the session. As for the consent and GDPR annoyances themselves, they can be killed easily with uBlock (along with the ads etc.).
Welcome to the smooth, no-tracking surfing experience of circa 2003.