I stumbled across
this video on reddit and I think that while it's played for laughs, it really drives home the difference between the show's approach to Ellie and Dina and the game's approach. This is, at this point in the story, the primary relationship and while a lot of the same beats take place in both the game and the show, the way things are portrayed is radically different. The video (which is very short, you should watch it) compares the exact same scene in the game and the show.
The game's scene is layered and complex. There's so much going on that isn't spoken. They're discussing the map in both scenes, but in the game there's so much rich subtext. The dynamic between the two characters is filled with unspoken resentment, guilt, and feeling. The show's version is filled with jokes and playful banter. One feels like two mature characters on a serious, deadly revenge mission. The other feels like a sitcom.
Ellie is portrayed as a plucky, unserious little girl throughout Season 2, as if she's barely grown a day past fourteen (and this isn't helped by Bella's youthful looks). This leads to some very weird dynamics between these characters. At times, it feels as though Dina is more invested in revenge than Ellie