I see no called-out connection between anything in the article and the gif at the top of it. It's a good gif to go along with the article, but I don't think we can say "he threw the tablet in this image because he was angry with it".

Edit: this comment is at -2 at the moment. If I'm wrong, please make the connection. I earlier pointed out that coaches are often emotional^1, and we have no idea if him throwing the tablet is related to him being angry at it, or even if it's a recent image.

[1] http://www.reactiongifs.com/wp-content/uploads/2013/03/Fuck....