@Sam-site This worked for me! I could not for the life of me figure out how to open the console using the "Hotbuild Preset"-keybinds, but finally found the button when I switched back to the "Default Preset" -keybinds. Putting in d3d_windowscursor made problem of moving the mouse causing lag go away.

If anyone knows the button to open the console, or where in the settings to change the open console-keybind I would appreciate it.