I am not a huge fan of shit hits the fan in the last episode ending. and I also think part 2 shouldn't have been separated from part one and that it could have been better.

That being said. This drama was from episode one a direct attack on the school system and college entrance exam. It had a message and was committed to it. The happening was not "spheres falling" but "exam points being offered". They never made an effort to study, analyze, or inspect the monsters beyond what was needed on site. So beating and solving the issue was never the solution.

I do agree with the idiocy of the adults and was baffled to see parents still caring about the exams; however, I wasn't surprised. The show didn't give us an ounce of hope that the kids will make it (no survivors scenes or experiments and labs like all of us are dead). Is this a good ending? Not really. Is it a bad one? Not necessarily. Would I still recommend it? Yes! If I go back in time would I not watch part 2? Part 2 wasn't bad it was a continuation of part 1 plot, the plot wouldn't change and the ending make sense in that case.