We were all beginners at one point or another, and we ought to respect everyone's beginning regardless of what it looks like. Critiquing another artist's skills or mocking them for being inexperienced is in extremely poor taste.
"But it could look better, I'm just giving them advice so they can improve-" no. If they want advice, they'll ask for feedback. Also, feedback should be given in a constructive and kind manner, not just an infodump of their flaws. it's called constructive criticism for a reason, because it's meant to build others up not tear them down
There are so many art babies just starting and it always gives me hope for the future of art, knowing that people are still finding joy in creating and starting on the long journey of being an artist. We have got to take care of these beginners, not crush their spirits by criticizing them for not being as experienced as the artists further down the trail. It is a process. Let them learn like we did, like we still are learning.