Very much like you added too much noise reduction. Made everything look too detailless. Perhaps the initial exposure was not enough, so you tried to compensate by adj exposure in pp and then trying to get rid of the problematic artifacts. Need to perhaps try to use an iso that is lower, though that would make exposure longer.
Things that would help this score better: Better lighting. The gray overcast day certainly didn't do these guy colors any favors. Better lighting would also improve your depth of field and allow you to get a faster shutter speed for stopping the motion. IMO, motion should be all or nothing. Give it lots of motion or make it super crisp.
ducks are a bit blurry due to motion and to a looking through a window? i like this and personally think pushing the abstract side may have been really good