Originally I though Musk should be given the benefit of the doubt about building this thing but the more it drags on the less obvious his good will appears. These guys were looking at every single option available to them to get the children out as safely as possible. Super-Musk the Iron Man offers his services as a space ship builder and of course they accept and encourage it. Off Musk goes to tweet about it, generate good press and present himself as hero only to reportedly rock up post d-day with a useless tube entirely unfit for purpose.
He promised people in dire need the earth, boasted about it, then provided peanuts. Diver guy expressing these sentiments seems well within his rights.