Jurassic World: 10 Things That Completely Ruined Fallen Kingdom
3. A Human Cloning Sub-Plot
Throughout Fallen Kingdom you always get the feeling that you're watching two different films competing to come out on top, and by far the worst one of the two is built on a plot surrounding Lockwood's granddaughter, Masie. A mystery is set up from the get go about her relationship with the rest of the characters, with the implication being that she might be the daughter of Jurassic Park's Lex.
However, it's eventually revealed that she's not really anyone's daughter, and is in fact a human clone. Her existence is apparently what drove Lockwood and Hammond apart years ago, but the fact that she's a clone doesn't really go anywhere. It turns up far too late and is merely an excuse to make the ending choice, to release all of the dinosaurs into the wild rather than killing them, make a lick of sense.
There were ways to make this reveal actually integral to the plot as well, as it's suggested that the Indoraptor has been created by merging a bunch of genetic material to make it receptive to human commands - some of which could have belonged to Masie. Yeah, that all might have been stupid, but it would have at least warranted this plotline being included in the first place.