To clarify, it’s avoid “success at all costs.”

Rather than “avoid success” at all costs.

It’s a joke in the Haskell community that relates to the language’s early history and its ability to break things without much fuss. Things have settled down a lot more in the last few years, hence the shift in emphasis.

No, that is not an explicit goal of Haskell. To prove otherwise, please quote from Haskell 2010 Language Report.

You know, it's just possible that the Haskell 2010 Language Report is not the only valid statement of the "goals of Haskell".