Be incredibly kind when judging other people for their projects. What goes around comes back around.
IMO a lot of the problem is not in finding things to blog about, but the fact that the Internet hive mind will casually toss off incredibly unkind criticism about your projects.
I remember https://harthur.wordpress.com/2013/01/24/771/ making the rounds almost ten years ago, and it played a big part in making me and many others nervous about exposing our projects to the world. The fact that there was any debate at all around whether or not the people criticizing that project uninvited was terrifying.
Of course, I have developed a thicker skin since then. And things are a lot better in 2022, and I imagine (or at least hope) that most people around here would not have such negative reactions to a hobbyist project. But it's good to remind ourselves every now and then.*