The problem is pretty hard to explain shortly, so I've attached a picture above. I'm using an ASUS FX505DY with a Ryzen 5 and RX560X, native resolution is 1080p. I want to play games at 1600x900 as I don't like 1080p on such a small screen, and to maximise FPS. I've done all possible configurations of GPU Scaling in the Radeon Software, configured high DPI scaling settings and compatability, text scaling, driver cleanup, multiple restarts - nothing. And this happens for every single game, no exceptions.
Any help would be greatly appreciated as I cannot use the laptop like this.