You are asking the camera to understand everything - and it can't do that.
The histogram shows that the majority of the scene is below center, thus slightly underexposed. That's because the bright overcast is affecting the meter in the camera.
Expose for your target.
With this nondirectional light, everyhting looks a bit flat and toneless thus
looks un sharp.
You've included a lot of foliage that really adds nothing and you have this OOF branch right across the center thus confusing the viewers' brains.
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If you get rid of some of the excess foliage, increase contrast, raise the midtones a bit, along a bit of saturation and a bit of warm and things start to look better to me - except fot the branch, obviously
You must be in control, don't leave it to the engineers back at the factory.
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