They are going to make Phil bad, so that Tyrone can look good in comparison and we can all cheer when Fizz and Tyrone get back together. This, despite the fact that everyone agrees that they are far better characters apart and their family unit is toxic to them, and their respective children who they are supposed to care about. ( I refuse to use the word love, as I’ve never seen them show anything vaguely resembling doing what’s best for them)
It’s so predictable of the writers, and so very, very basic of them.