There is a moment in one of Terry Pratchett's brilliant Discworld novels where the protagonist's "organiser", a magical device reminding the owner of his daily appointments, breaks, so it starts reciting the schedule from an alternate universe where the characters made the wrong choices with awful results.
This feels like a show made in that darker timeline.
Maybe the producers were making their own steampunk cop show and decided to slap Discworld names on it as a marketing afterthought. Imagine if someone was planning an on-the-road sci-fi/comedy and, by some dark miracle, managed to get the Lord of the Rings license from the Tolkien Estate: cue a LOTR version where a bunch of stoner hobbits and an insane cackling Gandalf ride speeder bikes towards Mordor through a cyberpunk Middle-earth; Aragorn is a woman, Galadriel a dude, Gollum a politically-minded revolutionary and everyone else is missing. That's The Watch. I'm no purist when it comes to adapting books to screen... but when setting, plot, tone and pretty much all characters are unrecognizable, you should just create your own original work instead of bastardizing someone else's.
Some of the actors could have been fine in a proper adaptation, like Dormer as Vimes - if the iconic character had not been turned into a punk Jack Sparrow. Vimes - who is, with Granny Weatherwax, one of Discworld's most complex, nuanced characters among so many memorable ones - was, pre-development, a broken, depressed drunk, not a goofball. Nearly every member of the Watch has been tinkered with in similarly deplorable ways, to say nothing of Sybil.
Also, how do you ruin the running joke of the huge Carrot being an adoptive/honorary dwarf? Why, you cast other tall actors as dwarfs! It takes some special kind of anti-genius to mess this up.
So, as its own thing? Not good. As an adaptation? Offensive, tone-deaf and nightmarishly bad. We'll always have dozens of great Discworld novels, I know, but it's sad we couldn't get a good Watch TV series as well.
1/10.