Almost burnout story? What about right now...

Customer was really positive about the new site we are creating for them then, out of the blue panic, they complain about features (calculations) which aren't implemented yet (they didn't provide any information for the calculation until 1 week ago.) And they complain that the site does not has any content

THAT IS RIGHT YOU DUMB FUCKS...
I can't magically create content for YOUR site...