You know how it is...  If you don't say anything like "Gush, gush, this is THE BEST yet!!!!" you are considered a troll.  Criticism is not really wanted in the gallery, no matter what they claim.
Someone told me once, on one of my early renders (pityful as they were), "You know, this is good, but if you do this and that, it would be great."  I have never forgotten that advice as it helped me a lot...

L'ultima fòrza è nella morte.