These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Opinions are mixed regarding Diane Kruger's character having Asperger's. A related debate has ensued over whether the writers should be more explicit about this in the show.
Marco Ruiz's affair with Charlotte Millwright came across as Out of Character for some viewers, at least at first. Though it was revealed that it's not the first time he's cheated, either on Alma or his first wife.
The whole David Tate reveal provoked mixed reactions, especially after the Wham Episode that was "Vendetta." Some felt that after The Reveal, the whole David Tate plotline essentially hijacked the entire show by devoting much less time to the more interesting weird storylines. The creators admitted to trying to get the David Tate storyline out of the way as quickly as possible because that what the main storyline from the original Danish-Swedish Bron|Broen and because they wanted to open up The Bridge to more possibilities that are beyond the scope of just a strict adaptation of Bron|Broen.
Growing the Beard: Come season 2, when the show producers threw off the restraints of following the plot-by-plot approach of Bron|Broen and took the story into their own hands.
Villain Sue: Fans have raised objections to David Tate's seeming omnipotence, believing it to reach its nadir when he somehow shows up at exactly the right place and time to Car Fu Sonya and Gus. And then there's the fact that his plan involves things he has no way of knowing or controlling, such as Marco having an affair and Alma throwing him out for it.
Ray in general. His Old FlameFriends with Benefits shares her secret tunnel, and he immediately plots to use it for his own gain with his partner in crime. Who is working for the ATF.
Gina Meadows, the teenage girl who witnessed her father's murder. She's under police protection and after learning that her mother may lose custody over her, she decides to make a break for it. And is promptly murdered by the same serial killer.
Kyle, the teen who encounters Eleanor Nacht washing blood off herself. Contrary to his Genre Savvy friend, he decides to help her and blindly follow her demands in return for a peek of flesh. Needless to say, things end badly.