Student or Learner
He's late again. So much for good intentions!
What does the second sentence mean? Whose good intentions? What kind of intentions for example?
Then, in spite of his good intentions to arrive on time all the time, he was late. So much for that resolution!
"So much for that!" is an expression indicating that you have given up; or abandoned, discarded, quit, or disposed of something; or that it has been dismissed or can be disregarded.
You might use it wherever you would exclaim "Fail!"