There is no such thing as "get as good as a human artist" unless it becomes an actual human that lived the human experience. Even bad art starts with something to express and a want to express it.
Without that, it's only as good as a human artist in the way a picture of a work of art is.
Actual AI art would first require an ai that wants to express something, and then it would have be trying to express something about the the life of an ai, which could really only be understood by another ai.
The most we could get out of it is maybe by chance it might be appealing like a flower or a rock. That is, an actual flower not an artists depiction of a flower or even an actual flower that someone pointed out to you.
An actual flower, that wasn't presented but you just found growing, might be pretty but it isn't a message and has no meaning or intent and isn't art. We like them as irrelevant bystanders observing something going on between plants and pollenators. Any meaning we percieve is actually only our own meanings we apply to something that was not created for that purpose.
And I don't think you get to say the hate is misdirected. What an amazing statement. These are the paying users saying what they don't like directly. They are the final authority on that.