In that order, please:

1. submit a bug report
2. submit a patch
3. give the author some time to solve the issue
4. and finally, if the author is unresponsive or just don't want to solve the issue, then you can complain publicly about the bad status of the module.

It's Open Source, even a non working module is not something useless, it is something you can repair yourself and make functional for much less effort than writing the whole thing from scratch (well, mostly).

Using CPAN Ratings (or any other forum) to complaint about broken modules before letting the author know and solve any issue, well, I think this way of doing is very disrespectful.