That sounds awfully similar to our own reading of Department Q. I'll watch it too.
Also it is sometimes hard with these detective shows because the screenwriters might want a character to be hyper-competent, but they are people too, limited in their ability to portray super-competent abilities. This can result in characters lucking their way into clues.
In some ways similar to Lamb in Slow Horses, though I think Lamb is a very good manipulator of people (he gets others to do what he wants without telling them directly), whereas the Dep. Q guy doesn't engage at all.