You are correct. This is story that sounds plausible to someone who doesn’t know how the Monarchy works.
The part about her antics preventing Charles from becoming King is pure BS. The Line of Succession to the Crown is set by Act of Parliament. Changing it to Exclude the Prince of Wales would take an Act of Parliament in everyone of the 16 Countries that share Elizabeth II as Queen.
Not going to happen.
Sanity ! Thank you.