
Nick is the only character who becomes MORE EVIL as seasons go by
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For all of the people who think that NIck chose Gilead because he no longer had June and he had no other choice....The rebellion would have been the perfect time to get Rose and their son and take them out of Gilead. If he had stayed at the hospital with Rose when the plane blew up, Nick could have made a deal with the Americans: immunity in exchange for working with Mayday. Rose would have had to agree because she didn't have anyone else with her dad dead. He could have gotten them all out and been free. But, then he would have just been a regular guy with a family struggling to survive. He chose comfort and power over freedom and morality. Now, Rose and their baby are in the hands of the Americans anyway and they have no one.
He was involved in overthrow of the US Government. This was made clear in an earlier season. He was an eye and then a commander. He never turned in Commander Waterford for his perverted ways and instead asked for a transfer to the front. He killed a 19 year old brain damaged guardian, he had earlier shot, in cause he recovered enough to identify him. He had numerous opportunities to leave Gilead, but as we heard him tell June, he would have been an Uber driver or delivery person if not for Gilead. Choosing Gilead was his way of elevating himself in life. He made a series of choices that led to his final choice. He made his final choice joining the other commanders going to DC to discuss what actions Gilead would take after the rebellion in Boston. Somethings Nick did we liked, like helping June and providing info on Hannah, but less we forget, he even originally hid his marriage from June. The first choice he made to support Gilead in the overthrow on the US Government, he never said he regretted. June and Hannah and so many others were casualties of that choice.