I must confess I'm let down too. For such a great series, where (as Kev brilliantly saved) the strenghts of the show made you forgive and forget the occasional cheap and convenient plot points, the ending was a bit meh. Not Dexter or Game of Thrones meh, but not up to par with the rest of the show.
I agree also with the comparison of the flash forward of Walt getting the gun machine at the beginning of Season 5 of Breaking Bad, and the car crash scene, but here's the major difference: with Breaking Bad, you knew things would go sideways. You'd watch Walt occasionally enjoying life and think "man, how can it go wrong?". The car crash at the beginning of season 4 did the exact opposite, it told you that everything would be fine and the family, at a certain point, would be happy, alive and together.
OMG, this stuff is happening, what if one of the family dies since it's the final season? ...they won't, they'll be alive until at least the car crash.
OMG, will Wendy lose her kids? ... no, she won't, they'll be together, and even if she loses them, they will come back.
The car crash stole all the tension from the show, and when it finally happens.... everyone survives? that's it?
I get that it was a way to show that the family realized that they had to stick together, and that's why they accepted Ruth's fate without trying to meddle any further, 'cause they "had" to get out at all costs, but it was rushed. Maybe if we had more time and more episodes... maybe if we could have seen the aftermath a bit better, seeing the family devastated in realizing that yes, they got everything they wanted but they left death and destruction in their wake... it would have been a bittersweet ending, yeah, they get away with it but their life is emotionally ruined and they won't feel joy anymore.
Also Jonah's "turn to the dark side" is so sudden, he went from hating his family for what happened to Ben to kill someone to protect them? again, I get that the car crash was a wake up call to the importance of surviving and sticking together, but it was poorly executed.
And Ruth was this show's Jesse Pinkman and definitively deserved to make it out alive. Congratulations to Three who, by doing absolutely nothing, is now the richest Langmore ever in the Ozarks I guess.
It's a pity, I'm not angry, just a but underwhelmed. I really thought they had in them to finish as strong as they've always gone.