Graphics look bad. Jagged Edges.

@daniiona  Your graphics card should be able to handle ultra settings without any issues.  The problem may be some antialiasing setting, either in the game or within the Nvidia Control Panel, and it may take a bit of tinkering to get the kind of picture quality you want.

Please right-click on your desktop, open the Control Panel, select Manage 3D Settings > Program Settings, and create a profile for TS4_x64.exe, if one doesn't already exist.  Set "Antialiasing - Mode" to "Override any application setting," then enable "Antialiasing - FXAA."  Apply, close the Control Panel, launch Sims 4, and see how it looks.  Please try it with Edge Smoothing both off and on in-game, and in both fullscreen and windowed fullscreen modes.

If this alone doesn't get the effects you want, you can try changing the other antialiasing settings in the Control Panel.  There's no harm in experimenting a bit, and again, check in both fullscreen and windowed fullscreen modes.

Since you're not the only person who's reported this kind of issue, I'd like to see a dxdiag as well, if for no othe reason than to compare your info with that from other affected players.

https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/