However, in the past there have been some Russians, Germans and Eastern Europeans with very
strong accents, even some of them having being academics, who have been let go quickly
on account of complaints from their students

"have been" "even some" "having being" "have been" "quickly" "on account of"

This is text book Chinese academic writing: needlessly complex sentence structure where verb agreement collapses, littered with archaic prepositional phrases.