Hello Bruce, I read this this morning and am sorry you feel disillusioned. Having a quick look at your journal you seem to be popular having a good number of followers and a lot of comments.
I'm kicking the answers off first, having been thinking about it during the day. Whe Blipfoto had paid staff, we did, indeed try Special Interest groups like Landscape, Pets, Gardening and Critique Welcome. I can't remember how well this worked but it was overseen by blippers proficient in the various fields.
Now, it's down to us! Do we say in our Bio that we would like critique? Do we ask other blippers how we could achieve a particular effect? Do we ask on a particular blip if there are ideas for improvement?
I teach photography and when I feel someone would like a suggestion I am more than pleased to help. We used to do that a lot when I began 11 years ago, and there is still one blipper I can rely on to pull me up when he thinks my blip has fallen short of the mark! I love it!
I think what we have to do is establish that sort of rapport with each other, make those who follow us regularly know we would value their opinion and critique.
Blip is a real and valuable support to so many in its various forms - make it work for you how you would like it to be.
Best wishes, clickychick