Not the one you have been asking, but you can eigher install Lutris, and then install GW2 from there, or download it on Steam. Those are 2 fairly straightforward ways. If you have an ArenaNet account (rather than an account binded to Steam), but still want to use Steam as your launcher - just write “-provider Portal” in launch options.
What fashion crime?
I would call it “highlighting your features” ;)
Great dog!