Rags had Director issues.
First, the producers hired a person who had never directed a big musical before (or since as I recall).
Secondly, they fired her right around the Boston opening without a replacement lined up. (Schwartz stepped in for a while before Gene Saks signed on after just about every other director who was not working was asked.)
Thirdly, Stratas missed the first week of performances in Boston so no one knew exactly what they had. And with no real director there was no one to know or tell what the audience was seeing.
After Boston there was a period (a week or 10 days) of rehearsals and restaging of the rewrites by Saks. Everyone was on performance rather than rehearsal salary. Even a week of this is prohibitive.
When they opened the reviews were actually mixed-to-good, but there was no advance and there was no reserve left, so they closed in four days.
These things happen. Flippant, but true.
PS: Legs Diamond was the last show to play the Hellinger.
"If my life weren't funny, it would just be true. And that would be unacceptable."
--Carrie Fisher