Looks like you hit Save All Info too soon, as that dxdiag.txt is missing lots of information. Please wait for its progress bar to finish before doing that, thanks.
Also, Right click on stellaris.exe , properties, compatibility. Tick "disable fullScreen optimisations" untick every other box in that dialog, Apply and exit.
Then in the launcher Game Settings menu, select fullScreen display mode, Vsync off, refresh rate 60.
Any different?