Well that went to hell...
Not sure how you manage to degrade them so thoroughly but you certainly did.
#1 Contrast curve is off.
#2 ISO setting too low, underexposed.
#3 ISO setting to high; need more light.
Underexposed, cam shake with possibly bad focus.
#4, as with the others there isn't near enough resolution to view it well.*corrected*
The statue should fill the frame more as cropped below. Contrast curve looks off.
It's focus looks off and a lot cam of shake.
The AF lock should be on the statue.
You got some work to do... a D5200 image should look a lot better
Is the AF calibrated correctly; try manually focusing it.
This is low quality because of resizing. Contrast curve may be better but did have app to do it; used the one shot tone curve correct on my phone.
Therefore contrast curve is still not optimum.
ISO 100 isn't desirable if it yields a bad image.
Dial up the ISO setting to get at least 200 of a second if you can't keep the cam still and for you it probably a lot higher until you improve your shooting technique.
Brace on something and learn to be smoother with the shutter release. Punching the release is similar to pulling the trigger on a gun; move the release not the cam.