How can such a cover design be improved?

First of all, before making this cover, you had too many things to express in your mind, so you put all the representative elements on it. This cover contains three types of ink: ink in water, ink on rice paper, and... Ink made with PS. When these three kinds of ink stains appear in a picture at the same time, the sense of dissonance instantly rises to countless levels. After each typesetting, you have to carefully choose a font that looks good and fits the theme. Then three different fonts appear on the screen, as if they were taken from three covers. There is nothing aesthetic about the font layout. Since it is an art exhibition, it must reflect a calm, quiet and disciplined style. After all, this is not a graffiti art exhibition. In view of the above, it is recommended to clear the elements in the picture. If you really like the ink stains, you can reluctantly delete them. At the same time, remember not to make a fuss about the title, just let him make a title quietly, and avoid such messy things as encircling words and pictures. For fonts, refer to how to use fonts. Before you understand font design, just use genuine official fonts, and only one font is enough. The final typesetting must be regular and steady. Everything that is unique is not necessarily a good thing.