what would you change about my art? what are some key features of my style?

i don't think ive ever asked for public criticism before, it scares me, but ive felt so stuck in my art lately and it's heartbreaking because my mental health is in a bad place, and art used to be my outlet. i recently got an anatomy art book so i'll be improving that, but im so unhappy with my art and i don't know why. im not passionate anymore. it's hard for me to finish art, i had to scour from the last 6 months to find these images(the uwos lab drawing is one of my most recent doodles, the christmas one is from earlier this month and i wish i liked it more. i only notice the mistakes and the things i was lazy about like forgetting to shade some things). how would you improve my art? how would you change it? what do you notice about my art?