I am also a Dane and I really liked it, especially Kaas performance. I could really see Dirch in him. He portrayed the external pressures from managers, co-workers, family and friends beautifully, but his internal pressures really shined. Like a dog chasing his tail, never reaching and running faster and faster, without knowing why.
And I loved most what Dirch did. Cant really say that he was vulgar as such. They included (for me) the most important part Hoppegyngen, on youtube.
Its not a perfect movie, but all in all well worth the time and money to go see it. I would see it again.