I have some similar experience, but I don't think it's entirely bad. If the motivation to check out <new language-X> was to learn something about it and you coo

I have some similar experience, but I don't think it's entirely bad. If the motivation to check out <new language-X> was to learn something about it and you cooked up a project with that goal in mind, not finishing the project doesn't mean you didn't accomplish your actual goal of learning something about language-X. In other cases, I'll start a project only to learn in the course of it that it's a bad idea or doesn't have as much upside as I initially thought. In those cases, finishing the project would lead to a worse outcome than stopping the project once that discovery was made. Projects as an adult aren't the same as school projects. If you don't finish a school project, it's bad (at least locally). If you don't finish a project as an adult, that could be either good or bad.