I've praised most of the series I've reviewed here. This post will be an exception.
I watched The Undoing (2020), an "American mystery psychological thriller" television miniseries starring Nicole Kidman and Hugh Grant. I love Ms. Kidman and expected to love this also. The series gets 7.4 IMDB points, but I'd give it only 5.8 or so. I like mysteries, but "psychological thrillers" work for me only when very well done. This one did NOT thrill and any "psychology" was confused and badly plotted.
Except for the two excellent stars the series is an utter flop. Don't waste time on it. Some reviews agree with me: "Through all of the misdirects, the characters' dumb decisions, the dreamy detours" ... "It's all extremely rote."
To explain in detail why the story development was inept would be Spoilers, but I'll mention one annoyance. In a critical interview an informant takes time out to mention a grammar error. To deflect a very serious conversation this way might call into question the informant's psychology: I treated it as a clue! But it was a complete red herring (if not just a scriptwriter's joke) and never mentioned; the informant's opinion was taken as truth.
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I started Bloodline (2015-2017), also an "American psychological thriller." I've abandoned it; it's bad in so many ways I won't bother to review it. It gets a whopping 7.8 IMDB points, but -- based on the 4 episodes I did watch -- I'll give it 5.1.