there's usually two problems that make it difficult, though. One, it's increasingly difficult to differentiate between someone who is a brand-new artist vs someone who's been posting the same shit for decades unless they actually say so. Two, regardless of the skill level, there are artists (and writers, and meta-providers, and memers, and RPers, and cosplayers) who are so addicted to attention that if they don't get enough attention for something they post, they start whinging about why people don't like their shit and you just don't have the heart to say "because it's not very good."

I'm no saying it's required for newbies picking up a thing to openly remind everyone that they're new to this and please be gentle every time they post, but I absolutely would get behind people having a little more self-awareness and humility. That goes for consumers as well; if someone has put out a piece of fandom content and not asked for critique, do not openly critique. Consume to whatever level is best for you, but the easiest way to not bully anyone over their art/fic/whatever is to keep your goddamn mouth shut unless they've specifically asked for advice to improve.