P J, it can be a bit random whether you get any critting for things that are in the general archive: it's such big, busy site that most people tend to concentrate on the critting relationships that they develop in the groups. Is the Crime & Thrillers group full? Or even Comedy?
Yes, do join groups, P.J. - not everyone remembers to look in the main archive every day, and pieces slip down the list very quickly - it certainly doesn't mean it was no good.