Since music notation is a form of communication, wide adoption is a huge factor in what is considered better.
We could come up with more precise and effective languages than the ones we naturally speak, as well, but the good-enoughness of the ones we already have and the fact that others around us are very likely familiar with them is more important. Utility trumps quality, and worse is better.
That said, if all you want is a different notation system for you to use personally or with small groups of other proponents, there are plenty to choose from. ABC and MML variants use letters for notes and numbers for note lengths, for example. Probably not optimal for sight reading, but maybe better than staff notation when writing or transcribing music. There's also trackers and piano rolls. Neither is very good for quick conprehension, but maybe lay things out in a way that makes more intuitive sense.
We could come up with more precise and effective languages than the ones we naturally speak, as well, but the good-enoughness of the ones we already have and the fact that others around us are very likely familiar with them is more important. Utility trumps quality, and worse is better.
That said, if all you want is a different notation system for you to use personally or with small groups of other proponents, there are plenty to choose from. ABC and MML variants use letters for notes and numbers for note lengths, for example. Probably not optimal for sight reading, but maybe better than staff notation when writing or transcribing music. There's also trackers and piano rolls. Neither is very good for quick conprehension, but maybe lay things out in a way that makes more intuitive sense.