All that counts is that it brings you happiness. I aaked my son to look at your drawing and he agrees you are far above simple or average. He says the hair looks great (I say the same) and if you receive that many negative critics these are most likely generated by bots.
Many social media seem to use them or they hire internet bullies.

You are never too old to learn, improve, try out or change your style. Lookat the old old and famous painters.

All you can do is getting better which happens otherwise your feiends wouldn't ask or like the results.

Have you thought about starting a drawing club?

🍀♥️