Re: Moving In-Game Camera
@sterredxb1 With the Sims 3 camera, I've always zoomed in and out by scrolling the wheel, and moved the camera angle by holding down the wheel as I moved the mouse. I can center the camera on a different location by right-clicking that location. Do these not work for you? If not, try switching back to the Sims 4 camera, quitting, restarting, and switching back to the Sims 3 camera.
If it still doesn't work, please disable any apps that come with in-game overlays, for example Steam or Discord. Disable the EA App's in-game overlay as well; I believe the option is under Settings > Application.