I quite enjoyed the show overall up until the ending, but it was so frustrating how stupid the characters were. They were literal idiots which was so frustrating. Things happened because they were stupid or did stupid things. It was really frustrating to watch. Things happened because the plot needed them to happen even if it didn't make any sense. I would probably rate the series a 8-9 if it werent for the lazy writing.
Why can't people talk like normal people and communicate important things in a few seconds instead of letting interruptions get in the way?? It is fake tension and lazy writing that adds nothing to the story.
The ending wasn't suprising, but it could have been written better.
Also time travel just ruins everything. Never ends well.