Get xxx vs. Become or Be?

I saw a post asking, "Wanna get infuriated" about a puzzle, and was annoyed at the use of "get." It sounds wrong in "get happy," "get infuriated," and "get amazing." But sounds fine with "get sad," "get angry," "get old" ("get young"?). Is it misused, and have we grown accustomed to misusing it in some circumstances and not others?