I think that title quote paraphrases the late Brian Clough, and sums up this whole aimless and pointless effort. Richard Harrington vey rapidly used up his full stock of ten facial expressions, at least two of which are 'confused', and it was downhill all the way from there.
I really can't believe I watched this right through to the end, and I think it was only for the Welsh. My work took me to that nation for some years long ago, and I made an effort to acquire a smattering of the language, so I was interested to hear it spoken. But of course the dialogue was way too fast for me, and I was totally reliant upon the subtitles.
And what did I see? A convoluted story with more plot holes than a Swiss cheese, and incompetence upon incompetence from the two central police officers. As for the ending, the very final shot, well no, NO, NOOOOO!
I should give it one, but for the small enjoyment I had trying to follow the Welsh, so a very generous three out of ten.
Now go away, Harrington, and don't come back, OK?