Inside Cynthia Erivo’s shock estrangement from her family — and the manager she scared off with ‘blackout rage’

In her new memoir, “Wicked” star star Cynthia Erivo, 38, opens up being abandoned by her father as a teen. “I was 16 when he left me, alone, in a London underground station after an argument about a transit pass,” she writes in “Simply More: A Book for Anyone Who’s Been Told They’re Simply Too…