It was an okay ending, not exactly what I wanted/expected.
What I was hoping for was everything leading up to a disaster, ideally in the penultimate episode. The last episode I wanted them to bring it back to the end of the first season, when Marty planned to escape with the family. I always expected Marty to have a plan to GTFO of town, he has to realize there's too many potential pitfalls in the world they're trying to navigate between the cartel, FBI, and politics. I thought he and Wendy would potentially separate, and Marty gets the kids out while Wendy's ambition/hubris drives her to stay.
Overall I still really enjoyed the show, it's not like it was the last episode of GOT.