Ok.. Shaders in the game are designed to mimic real life. You can’t simply expect to change those dramatically and get similarly good looking result.
Disabling eye adaptation will only get rid of the brightness shift. What you’ll be left is a scenery with static exposure. Some parts will still be too bright, some parts will be too dark. And it’ll stay that way since there wont be a dynamic exposure change to balance the brightness of the area you are looking at.
To get a more balanced overall look without dynamically adjusting the exposure, you’ll need to disable more shaders. Bloom, AO, etc.. And tone down the overall contast considerably, so brightest and darkest points of the image fit into display’s tone range.
What you will be left is a contrast limited image. Kinda similar to default Xplane look. You might try to come up with something in between increasing the contrast with post processing filters, like Reshade. But with or without dynamic exposure change, you’ll have the exact same problem as you push the image to a more realistic look.
Like I said, it’ll be nice to have a setting for more comfortable visual tone balance, for simmers like yourself. As long as you are not looking for a realistic result. You simply can not have both at the same time.