Your art sucks and it's really bad. Happier now? Nah, but really, when something is bad, ponies usually say it's not THAT bad. if it's ok, they say it's not that bad, with "that" in lowercase. if it's really good, they say it's great. If it's great they say it's awesome.
it could also be that people don't exactly know what to criticize on. i mean, whenever i feel like it, i try to bring my share of criticism, but i'm not an expert at visual art, so i don't exactly know all the ins and outs of it.