Ash vs Evil Dead.
This was one of the funniest shows that I've ever seen, it was just pure 30 minutes of crazy with a brilliant cast. I think it would have done significantly better if it was owned by a streaming service and produced during our current streaming service craze, if it was cancelled a little later then I think someone like Netflix may have picked it up, it can't be that expensive of a show.
But it was unfortunately created and owned by Starz and while Starz used to create some bangers, they also had a habit of cancelling absolutely everything eventually, at least with Black Sails and Spartacus (two of my other favourite shows) they managed to put out brilliant endings despite the cancellations, but Ash vs Evil Dead ended on a very annoying and hype cliff-hanger.
The Expanse.
One of my favourite Sci-Fi shows of all time and while it ended on a great note (it actually only ended this year, Lol), there are still 3 books left that haven't been adapted, the show ends before a point in the books where a very large time skip happens so it almost feels like a natural ending but there are still unanswered questions and I'd like to see the final books adapted.
Kingdom?
I'm not sure what the hell is happening with this show, Netflix hasn't renewed or cancelled it yet, but the last season aired in 2020 and instead they did a movie prequel in 2021, I really hope the show comes back eventually, it is easily the best "zombie" themed show that I've watched.
The Terror?
Yet another show that is in limbo, AMC hasn't announced a cancellation or renewal, I love anthologies though, especially Sci-Fi or Horror ones, the 1st season was amazing and whilst the 2nd season was a step down, it was still very strong.
The Exorcist
Great show, a very successful adaptation of The Exorcist IP Imho, nice horror with a strong cast and some amazing twists along the way. Of course, Fox cancelled it, because back then Fox cancelled absolutely everything (like SyFy and Starz).