This art lacks much substance. It's terrible, not going to lie. That doesn't mean your a bad person though. Not liking you because of bad art is like hating somebody because they don't do art at all, it's not a justified reason to hate somebody. I watched your youtube stuff, by the way. I don't fucking understand how you don't do well other than the fact that the art you put in your videos would seem pretty cringey if we're going by LeafyIsQueer fanbase standards.

What's the worst part of my art that needs improving?

It looks really, really bland. You really play up the cartoony aspect of it to the point where it doesn't look good. There's not much line detail at all. Shit, and I get told my art is flat and two-dimensional...

So it's way too Two-Dimensional?

Yeah, there's a lack of detail and effort. I can't say I'm very good when it comes to detail and effort, but y'know. You should look at artists you admire and take notes. Tiramizu, for example. It's hard to put my finger on anything really specific that's wrong here, but it's definitely a lack of detail. There's a whole bunch of solid-looking colours, the linework doesn't look soft or good, and even the background isn't very good. It's all very unrefined. If it helps you, go ahead and trace art that your favourite artists make. Trace anything and everything you like, and then try to take something from that and apply it to what you create. You can trace anything, ANYTHING, but whatever you do, DO NOT POST IT. Though, that goes without saying. Tracing does help, as long as you don't use blatantly traced linework in your art. It can help you analyze what makes a picture good more easily. And y'know, saying that an artist can't trace art (Even if they never let it see the light of day) is like saying a musician can't make a cover of a song. For the record, I myself didn't learn from tracing, but there are some shapes and features like horns, muzzles, ETC. that I just have to trace in order to figure out. It works better than trial and error.

You've been at this for a long time, and I must say, you're not bad. I'll give credit where credit is due.