The mousepad hanger… What’s that? Why would I want one ? Show it assembled and “in action” so people can see what it’s actually about, and explain it in the description. It also has no print profiles, which is what makerworld treats as the main subject.
The butterfly pencil… as mentioned the main image shows as a blurry mess because there isn’t a static photo, and while… cool I guess? it’s probably less interesting to people then you’d think.
Browse models and figure out what makes them attracting to you or not, replicate that. And understand that regardless of how well something is presented just what it is may or may not be of much interest to random people, once presentation is fine if you get views but no prints then it’s just that people were initially interested then when they saw the details it wasn’t something interesting to them.