Ok till the ending ..I mean he literally saved him from the Spanish thanos gang

What do you think the Mexican gang was going to do with the cop and paramedic? They were obviously going to kill them. Also, the paramedic didn't betray anyone. She was being held hostage and did everything she could to get out of her situation in the beginning which is understandable. We see during the halfway point that she sees Will as different from Danny and begins to understand that he is not a criminal sociopath like his brother. At some point she tells them to get down when the snipers are about to shoot them therefore she is no longer trying to "betray" them. And in the end it is pretty clear that even though Will participated in the act he was no longer on his brother's side but trying to fix his mistake and save the paramedic. If you actually use the little part of your brain that's needed to follow this type of movie you might have understood the character's motivation.

My problem with this flick is the characters were all established from the start and never actually changed or had any kind of ark really. Maybe the paramedic chick became more open or some shit in the end that's about it. Don't get me wrong I liked this movie, any movie that is a near constant car chase is sweet in my books. But the characters definitely needed some work.