Let's look at the biggest trouble first. Unfortunately, other people do expect lettershapes they, too, can recognize. Here are four pitfalls. Try slowing down. Make the extra effort of writing curves instead.
Zigzags make awful shortcuts.
They are a good foundation for handwriting, but poor lettershapes. Regaining a legible hand isn't hard. Just take the trouble of writing curves rather than straight lines. The word in the middle has a confusing middle letter. In fast writing, the biggest difference between the letters a and o is this.