The market decides what it's worth - if it's not selling, you need to lower the price. I had to do that with a few of mine recently.
Speaking subjectively, I'd say that your assets are just fine. You're right that they're of decent quality and a consistent style, but they don't stand out.
I'd disagree that they're similar to LimeZu's work. Yours is a lot more vibrant and stark. That's fine, but lean into it. Look at people like Goodgis who have a similar style.
Speaking from experience you'll get more interest from a unique style than you will from contributing to the vast pool of generic-styled art.