a teacher told my classmate when i did GCSE’s that he needs to sort out his handwriting or otherwise he won’t get the marks if they can’t read it, despite probably have written the correct information. it looked so neat but unreadable. Speak to a teacher about is as they will be able to tell you if you should try to change it as they have more experience with this stuff. But i do know it can be a problem if it really is unreadable