Nah, it’s at least two clicks - the first in the cookie banner to decline all cookies and tracking (which won’t save that setting and ask again on every page load/click on the page as you might want to be tracked in two minutes) and another one to cancel.
the first in the cookie banner to decline all cookies and tracking
that’s rarely a single click
Depends, I’m from Europe and there are many local sites that allow that. You might need to search for a bit (e.g. not a button but a link in some fine print). But yes, there are many sites that just don’t have a “decline all” button and that ask you to deny every one of their 937.726.193.372.129 partners (most of them double, as you need to deselect the partner and their “legitimate interests” separately…
The only way to save that setting would be with a cookie, so it appears to be working
