What should I do if some people really can't read their handwriting?

The handwriting is not beautiful, but everyone can understand it. Difficult words are generally because writers have added some cursive writing methods, especially cursive writing. Cursive writing has strict standards and norms. If you feel uneasy about standard writing, don't tell others, and you won't know it yourself. I suggest buying a cursive script for Copybook for calligraphy. It may be useful.