well, parasyte went nowhere real fast so i can empathize. prolly took me 2 weeks to muster up the shits needed to finish the last few episodes too
You were right, the pacing of that show got really, really weird in the last bunch of episodes. The serial killer was so out of place and was a bad plot device to end the show on. Also it was like with each passing episode, every human became progressively dumber.
It started off great, but it took a nosedive after Reiko's death. She was the only compelling character honestly.
kana was pretty cool actually, way better than his girlfriend. shinichi should've hooked up with her instead