I've got the same problem - during battles FPS is 30-45, in peaceful time it's 60-120 depending on amount of wrecks/loot. I even tried setting everything to low/off - doesn't help. Low/off and Max everything produce about the same results. RTX 2080 Ti, SSD, etc. G-Sync also. But turning off vsync (always had it turned off) doesn't help.