Do you remember the game people used to play where someone would write down the first line of a story on a piece of paper, fold it back so the next person couldn't see it and then they'd add another line, fold it back etc. Then at the end you'd read the story in full and laugh at the results? Well I think that's how Fast X was written. It's a mish-mash of the previous 9 films rolled into one with cameo appearances from almost anyone who's ever starred in any of them. The problem is the story is nonsensical - we have jumps to shoots all around the world for no reason at all. We have a few maudlin scenes from the past. And of course (this is not a spoiler as it's now everywhere in the press) Fast X is not in fact the last film of the franchise so there is no closure of any sort at the end. The cast felt tired, going through the motions. I think even they think there's maybe been too many movies in this franchise. The only saving grace here was the wonderfully over the top villain played brilliantly by Jason Momoa - every scene he was in stood out.
Yes there's the usual over the top stunts (though personally I thought not as good as some of the previous films) racing for no real point, fight scences etc so the fans of the franchise will probably enjoy it. But as a standalone film and even in comparison with the previous 9, it's a bit of a mess.
