Thanks for trying, Bohemia, some people will disagree, but content isn't worth a single glance if the engine it runs on is an unoptimized pile of trash. You've known about it for months, and you let it launch. I am disappointed, and I wish there was a refund option. My top-line recent rig build can't wade through the mudhole of unoptimized code you have made, while it slams through games of the same caliber and above.
I hope it is a lesson for you.