WAH! Won’t let me deactivate my account!

After about 10 tries, I know EXACTLY what to do to deactivate my account.
But however quickly I race through the prompts, giving them “the reason” they insist on, it doesn’t work.
As soon as I hit the final “deactivate” button I get “Session expired. Log in again.”
WHAT?!! They won’t let me stop using their intrusive, privacy-invading system?
App support is utterly useless. Told their bot I had just downloaded Facebook and got information on how to download Facebook!
I am contacting my Members of Congress and any Federal agency I can think of to get them to get these arrogant tech toads to respect my wishes!
From what I can tell, Facebook is designed on the principle of a Venus flytrap, not a service.

Maryls iPhone 4S about Facebook, v165.0