Just finished watching this, was absolutely amazing up until episode 12. Would dare say 9.5/10
Then it slowly got worse, twists are all obvious, death flags are blatantly obvious as usual.
The conclusion was okay, but left a lot of things unanswered and was just thrown together with little thought tbh.
Biggest problem with the show was the parasites changing personalities only when it benefited the story, and switching back when it's convenient. The last episode is an insult to every other episode. That and the friendship built off something impossible? Meh, whatever.
Was a solid 7/10 anyway.