You can also disable issues entirely on a project, if it's slightly larger than just one script. This, plus a disclaimer on the readme like "This was made solely for my personal use and I cannot provide support!" seems like an okay way to go about this.

I've written hacky one-offs before that other people used as a jumping-off point for something more serious, which is pretty cool to see. I'm always in favor of releasing your code for that reason, you never know if someone else will find it useful!

https://sachachua.com/blog/2020/07/why-i-love-free-software/