With most movies, after time passes, my opinion changes. The most recent of these is my newfound distaste for The Force Awakens. (that's a whole other story)
The Fate of the Furious is officially, in my opinion, the worst Fast and Furious movie yet.
This whole series is made up of objectively cheesy and bad films. Let's move past that. Yes, they are loved almost ironically, because these movies don't care about your opinion or that they aren't in the realm of reality. That's just what they are, and if you don't like that, then your opinion will always be tainted by your lack of a sense of humor or enjoyment of anything fun.
The Fate of the Furious undercut the whole message of the entire series: Family.
There is one rule throughout the tumultuous history of this series: you can kill massive amounts of people, fly a car through the air, fling muscly bald men through walls as long as it's in service of your family. In reality, this is horrible logic, but in Fast and Furious world that is the basis for everything.
At the end of Fast and Furious 6, it is revealed that Jason Stathem killed a member of the FF family, Han. He then continues to try and kill the rest of the family as well in Furious 7.
In The Fate of the Furious, Jason Stathem teams up with the gang, which is fun, but none of the past is addressed. He killed a member of the family, yet he has become part of it. The only way this ever gets explained is by a brief moment where Rock "The Dwayne" Johnson makes mention that Stathem was out to kill the gang in Furious 7 because he was also being blackmailed by the villain of F8, Cipher.
Now, here's my beef about Charlize Theron's character, Cipher. Her villainousness is fully based on the threat she poses to the Fast family. She is holding Vin Diesel's son hostage, and kills his son's mother, who ended up being the female cop from Fast Five, Elena. Cipher has now killed a member of this ever growing family, much like Stathem, yet suddenly, Cipher is worse than Stathem. Who's to say that Cipher doesn't join the team in the next film despite holding a baby hostage and killing the child's mother?
Stathem's joining of the team has completely undercut the badness of any villain, because no matter what they do, they can always just join the team. If killing members of the family is suddenly an unquestionably forgivable act, then suddenly there's nothing bad or evil that can be done to these people, which robs any future movies of their stakes.
This series only has one constant, and this movie completely shoves it aside. When you make the "family" no longer make sense in the Fast and Furious world, then you've officially reached the limits of my suspension of disbelief.
The Fate of the Furious was the moment where a this series jumped the impossibly high shark that I thought could never be reached, because how could you screw up the SINGLE THREAD THAT HOLDS THIS WHOLE SERIES TOGETHER?! Well, they did it, and to me, there's nowhere they can go but down.