Oof. It was a little dark and plodding (and intentionally vague- constant references to the fire and the guy in prison we wouldn't address until the end, being ~mysterious~ just as a hook) until the last episode, and then, wow, way to make the main character incredibly unsympathetic, and the one person who set all of his personal tragedies into motion by himself. Not that his boss helped- if it was ever actually dealt with maybe this would be a lesson to follow police procedure, but all of that was entirely shrugged off (as he continued to make MORE mistakes that we just...don't care are mistakes). Crooked cops who break the law but hey it's ok because they end up being "right" certainly isn't unusual in TV, but they went at that full speed in the last story.
If any of that was actually addressed, it would have been salvageable, but no- it was all conveniently tied up in the end so he faces no consequences for his actions, and even gets over that "dark past" that he himself caused. Healing from past trauma is all well and good, but this was just...indulgent and shirking of all responsibility.
Worst of all, people started randomly acting in ways contrary than they had earlier in the same episode even, just to conveniently move the plot faster. Were the writers getting bored, or just didn't think through anything they were doing?
The actors were great, the scenery fantastic, but man, the plot and writing were awful.