Gosh, I really wish I never had to see Florence Pugh or hear her phony accent ever again.
Obviously you're entitled to your opinion, but this part I have to say you're dead wrong on. Between working in IT and also doing it in a healthcare setting, I've worked with so many people who born and raised in Russia or some other part of the former Soviet Union. They obviously don't all have the same accent, but more than a few of them sounded exactly like Florence's Yelena. In fact she sounds exactly like Irina, this ER nurse I knew.