> along the ubiquitous "please verify your account" emails with NO OPTION to click "that's NOT me, somebody misused my email"

What would you expect clicking that "wasn't me" link to do?

In 99% of cases, the user who signed up with your address already can't do any more with that account unless you positively confirm it was you; and the site also won't send you any more email because they don't consider the email verified (and so sending to it might result in their emails getting sent to spam -> their email-sending reputation score going down.) So things are already in the state you'd want them to be in, no?

The only problem I can think of with that state is that now you can't sign up "fresh" for an account with the same provider, because now there's already an account associated with your email address sitting there in their DB in the pending-email-verification state. (But you still can acquire that account, by clicking "forgot/reset password" and going through that flow, which will inevitably go through your email, as anything like a 2FA setup flow always waits behind email verification.)