I found this installment a little wonky it didn't sit well with me as it did with the other two movies, the story was predictable as always same old thing villains either want to kill dragons or use them for evi. But this villain-- I swear to whatever is up there heavily reminded me of Gellert Grindelwald from the Fantastic Beasts movies. Same exact style. motive and pretty much methodology on how they would like to achieve their goals: sheer cruelty and some way of manipulation of their greatest weapons.
I love this franchise but I expected more as it is the final movie/ending of the story. Something different and unexpected but its the same. Same formula, same thing.