I have given further thought to the ending. Whereas I still find it very unsatisfactory, because I had really enjoyed the story as an intriguing whodunnit mystery, and I really wanted a mind blowing reveal, this is at the end of the day based on a true story, and one that is very recent and unresolved.
So whereas a much more satisfying ending could have been written, it would have deviated from the true story it’s based on. Although of course there are already several deviations already, so one could say writing a completely fictional ending would have been completely acceptable.
Incidentally, it is worth to read an account of the true story. Very interesting, and it has made me appreciate the series more
(anyone intending to watch The Watcher should not read any real accounts of it prior to it, obviously)
The True Story Behind Netflix’s 'The Watcher'
Ryan Murphy’s new limited series is almost too horrifying to believe. It’s based on a frighteningly true story.time.com
That's an interesting read and does explain the unresolved ending . It makes the Netflix story all the more creepy.