Hey, HoBBiT! Thanks for the DxDiag. There’s been other reports of Low FPS on the Menu or WebUI elements in-game, here’s the main thread for this.
There was a known issue with 1440p and above resolutions, but I have been seeing reports with 1080p resolutions as well. We’re gathering information on this to escalate over to our team and you are not the only one experiencing this problem. Any new information or updates will be made on the main thread.