Coming from the iOS side, I just don't get it. How can you rate an app that you haven't downloaded? And then if you did download it, why is it being quick-suggested to you again?
Furthermore, if you did in fact download it, removed it and then reacted negatively to a suggestion to download it again - how's your low-star reaction is NOT really a rating for an app itself?
Also, if you look closely at the graphs, the "crashing" involves rating slide from 4.67 to 4.38 and from 4.79 to 4.74. It's still an unpleasant development for sure, but that's not a "crash" or a "drop", that's a dip. The matter appears to be completely blown out of its proportions.