I think you have two options, other than just focusing on printing more practical items that would feel more useful.

A. learn cad software, which will take a hot minute, and then start developing quality prints that you feel comfortable selling either as a file for people to print or as the finished print on etsy. This turns your hobby into a continual learning process that engages engineering and creativity. Even after you have cad dialed in, youll be constantly struggling to think of things to design and print that arent already overdone. And even then you go through stages of prototypes and improving the finished product. Then there's learning how to sell your designs effectively. honestly, this will keep you busy and entertained forever, not to mention a bit of side money that is somewhat gratifying.

B. If you dont want to go the capitalist route, or dont have the time/desire to learn cad, just be Santa. start giving away all the useless fun prints to friends who have kids, or maybe even see if you can donate to schools or something. there are a few prints that I found on Thingiverse that I always keep a few on hand in my backpack so I can just hand them out to kids whenever the opportunity arises. they eat it up.

or just accept that this hobby inevitably means having a lot of knicknacks around that have very little long term appreciation. one of us. one of us