> What prevents you to do it better then? What prevent you from forking it? Sharing improvement ideas? Contributing to the project?

Time?

> Also, as everything that is open-source/free: if you hate it, don't use it, that's it. And let the people who appreciate it be productive and build awesome tools with it.

This is such an unhealthy attitude. Just because something is free doesn't make it above criticism. Also doesn't mean that the maintainers don't benefit from their projects even if there isn't direct compensation (more career opportunities, visibility, etc.) This idea that we need to walk on eggshells around anyone that does any volunteer work is kinda absurd.