Good UX should be intuitive, if you've done it right you don't need to explain what it does. The fact that so many people are utterly confused by this site shows that clearly it wasn't done right. If it isn't intuitive that's fine, it can still be good UX, so long as you add proper explanation, context, and callouts to make it obvious what the various interactions are. This site is neither obvious, nor does it have proper callouts to explain the interactions, which is why everyone is so confused. In short, it's bad UX, on top of a tool of questionable use to begin with. It's a single fixed color swatch. It would make a nice component on a larger site, say one of the myriad ones that allow you to select from a large collection of user submitted pallets, but as a standalone it comes across as kind of a flop.
If you post something you've done here, it's because you think you've created something others will find useful/interesting in some way. If it turns out that most people don't that just means you were wrong about how useful/interesting you expected it to be. You can do one of two things then, either try to fix/improve your effort and re-submit it later on to hopefully better result, or else abandon the idea and try to come up with something better. Either one is fine. What you can't expect is that people will heap praise on something they consider either boring, useless, or flawed in some way. The fact that people are taking the time to call out any perceived flaws is a service to the creator, its up to them to read others opinions, evaluate them, and decide how they want to react to them (either by accepting them as valid criticisms and working to fix it, or else rejecting them for whatever reason).
Ultimately if your "side project" isn't in a state yet to be evaluated by a large readership it probably shouldn't be posted here unless you're looking for feedback on how to fix it. That's the purpose of a site like this, it's to aggregate/discover interesting content, it isn't a dumping ground for every half finished project on the internet. I've got dozens of "side projects" that I'd never dream of posting here because frankly they aren't worth wasting peoples time with.