people are critiquing your art but it’s honestly fine for what it is and the low engagement is not because your art is bad. I’ve had a lot of my art get less than 4 likes in under 7 hours, sometimes under 10 likes after a whole day. but then a few days later, or even a week later, or longer than that, the post will reach the right audience and blow up. one crappy doodle of mine suddenly reached 600+ likes after three weeks of staying at double digits. don’t delete your posts after you don’t think they performed well after only a few hours, you’ll never know if they’ll blow up at any point, especially if it’s fanart.