Civ 6 takes a long time to start new games or load them

When I start a new game after choosing my options, the loading screen takes longer than whatever Sean says about the Civ.

I’m running it on a Thinkpad T450 with 16gb ram and an SSD using Ubuntu and Proton 9.

Are there command line parameters I can use to tweak performance?

Turns go by at a tolerable pace.