The romance was really creepy.
I have defended Moffat scripts in the past, I even liked series 9. But this episode was just...not good. I'm not saying there weren't good things. I actually liked the aliens, I thought they were creepy. I could even see them being a monster in the old Doctor Who serials.
But the superhero subplot was bad. It was really bad. It was even more obvious when the Doctor was away doing something and the focus was completely on those two characters. I honestly feel like they had the alien stuff written and realized it wouldn't make for a 1 hour special and just added a random superhero pilot script they had lying around.
The biggest issue was of course, the relationship. We are introduced to this girl as a supposed smart reporter (it could have been a nice nod to Sarah Jane even), but then for no reason she is completely dumb about the secret identity? She completely forgets about the aliens and the focus goes to some cliche date while they leave a baby alone?
Worse of all, he obsessed over her for 24 years, even after she married his friend, got a job to be near her, just because...what he saw her naked as a pre-teen? We get told he has been obsessing over her for over two decades, but we are never shown why? She barely notices him until the cliche "oh you are dating someone else" scene? Their interactions are more of an employee and employer than friends, let alone people who are romantically interested in one another.