How to make your art better?
Have you tried making things different? Think about the parts that you dislike about your art, then proceed to think, is the method what is annoying you? Is the result? Can you do something different if the current shape is not of your liking?
Try experimenting even if you have those feelings of "I don't want to fail" / "I don't want to make something I don't like", there is no one pointing a gun at you therefore, you can make mistakes, you can redraw as many times it takes you until you're satisfied.
Have you tried checking out the internet? Different videos, tutorials, classes, different artists from all around the globe sharing their methods and even with different teaching techniques or procedures. So in case you can't understand someone or their ways are not comfortable to you, you can always check someone else. Those who don't search won't find, it's a matter of typing, watching, trying, theorizing, coming up with conclussions, repeat. And even, sometimes there won't be answers ready to satisfy you, or to explain to you how to do things exactly so you are satisfied with your results, sometimes there is not even an answer and the only solution for you, it would be do things differently than you're used to, even if you don't know how.
You won't become better in a matter of weeks, or months, or even years. Everyone learns at a different speed and not everyone can use the same method, so there is no need to struggle nor get anxious as if there is a time limit. But you can be analytical, you can judge your work and you're the one who should know what to fix based on the things that you dislike in order to like them, what is that you hate about your art and then try to change it, but in order to do so you need to leave your comfort zone and do things differently.
As well, don't compare yourself to others, if you compare yourself to others then ask yourself what is that that you like about other people's artwork that make you hate yours. Try to replicate, try to study the art, try to watch if possible how others do things so you can have an idea and try to incorporate things to your practice, see what elements can you incorporate, or what elements you discover you can do in more ways than just one.
I cannot give you exact paths or answers, as I'm the kind of artist that back when started and asked more experienced artists, the only reply I got was: "Keep practicing" (just that, not even half of what I typed here lol)
Then that's when it clicked to me "What should I practice?", but I didn't receive answers, therefore, I had to come up with them on my own, I had to become critical of my own work and carve my way up