Or does it look low res? If so, what engine are you using to run the game. It also looks like you don't know how resolutions work. Unless you have a square monitor then you would not put 1080x1080. 1080p on a 16:9 monitor would be 1920x1080.
It looks extremely low res. Like the lowest possible. I gave prime example with those stats.. And now that told me. I can put 1920x1080 in game since im on 16:9. However i still wont get full screen. My game will have black side and will be 640x480... Its just that the game in meniu shows that i changed my resolution but in reality its the same always..
Make sure that your monitor is actually 1920 x 1080. Being just 16:9 isn't enough, it could be some other, but similar resolution like 1280 x 720.
Make sure that you actually entered 1920 x 1080, these exact numbers. Not 1921 x 1080, not 1920 x 1070, not anything else. Mistyping even one digit may cause problems.
The point is, you must set a resolution that precisely matches a physical resolution of your monitor, not completely random numbers like 1640x1640 or 1980x 1980 or even 3200x3200, not even close estimates like 1921 x 1080.
If it does, open Windows technical FAQ/troubleshooting guide and scroll to "Issue: Mouse is acting weird, movement of cursor on the screen doesn't match mouse movement. Image is cropped, you cannot see right and bottom sides."
Otherwise, upload a screenshot to this thread.