You were upset that the teachers were talking about your kid not doing her work and ignoring the fact that she loved her dog…? 

I don’t think there’s anything wrong with kids sitting on the ground?

What did you do that ruined the day though? Being a perfectionist?  you micromanaged everything? You were aggressive and demanding? Or you made things the way you wanted them to be? This article would have been more useful with actual examples of what went wrong