I am new to MSFS 2020 having finally got a PC that can handle it - I’m running an i5-13400F with a 12GB 5700GTX and 32GB of DDR5 RAM with the game installed on an M2 SSD.
I haven’t started to toy with graphics settings yet, and let MSFS recommend Ultra everything - which runs fine.
Some of the graphics issues, such as those below, are I understand a result of photogrammetry and nothing can be done to remedy them.
But others, such as this one, appear to point to an overly sharpened image - the trees in particular do not look natural. Similarly, when flying over water the water can look too sharp.
In general pick the highest default that gives you a reasonable frame rate of around 40-50fps. Then start tweaking. Personally I turn off a lot of the post processing filters because they are there only for the wow effect.
Aim for 100% TAA if you want to get a sharp iamge.
The most important thing for a sharp image is rendering in the native resolution without any up- or downscaling. The rest like DLSS, sharpening filters etc. is just a trick. It looks OK on 3D objects but doesn’t work on text displayed on digital displays which is what you’re mostly looking at when flying modern airplanes.
If you are referring to your last image, there’s no graphic setting to fix the bridge. That is either poor source data and the AI created a very poor bridge, or the data on the server is there but isn’t making it to you. It is probably the former. You could share that location and have someone else check out the area to confirm.