> Also Haskell gets the order of ‘<-‘ clauses wrong, so probably mine is a minority opinion.

That's probably so it's more in-line with do-notation:

  [x | xs <- xss, x <- xs]

is the same as:

  do { xs <- xss; x <- xs; return x }

Maybe writing statements backwards was deemed more confusing.

Personally, I don't really use list comprehension syntax, but maybe I would if they were backwards like you describe. It would make more sense with the position of the return value being to the left.