Notes:

For those that are unaware, Monica's Gang (Turma da Mônica, in portuguese) is a popular comic book series for kids in Brazil. Monica's Gang Teen is a sort of side-story with the characters from the original comic as teenagers. Thes comic is heavily inspired from manga (even down to the reading style!), and has a lot of pop culture references and parodies from movies, video games, other comic books and manga, and so on.
The character featured here is called Jimmy Five (or Jim Five, in this version of the comic). Here's a rough translation of the dialogue:

"Man, you guys suck at this game!"
"You only care about killing other players!"
"You're all forgetting the objective!"

Note 1: I don't have a link to the comic, since it's new and probably hasn't been uploaded completely to the Internet yet. Even then, I don't think there are english translations. I'll update this if I (or someone else) find a link.
Note 2: Any of you think I should move this to the Monica's Gang page? I'm not really sure, since this page has more views, and the reference is directly Overwatch. Let me know if I should move it or not.
Note 3: Sorry for the bad image quality, couldn't find any image that was at a higher resolution :/