In all honesty, the first thing I can think of just by looking at that screenshots with the Merc and that Jag, which are overexposed, with colors washed out and with a funky hue, is that you're adding some postprocessing filters on top of photorealism to turn it into something else.
If photorealism is your target, try to turn towards this general idea:
https://ibb.co/LQP8H0T
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