The ending was too cookie cutter with the good enjoying triumph.
Gus breaks into Malvo's home and executes him, is that a legal mailman move?
This series was entertaining, but had way too many moments where you needed to completely suspend reality. These moments were so prevalent it felt like poor writing to push the story onward, covering for a lack of writing talent. The study of chance notwithstanding, the glaring hole is camera surveillance that was completely disregarded (minus the one shot of Malvo, to provide a face of the enemy). All characters were able to do their ill deeds in public as if it were 1941.
In any case, soon there will be the thread "Who would win: Omar Little, Lorne Malvo or Anton Chigurh?".
Note that Malvo suffered a compound fracture in the left leg, a homage to Chigurh I assume.