Besides this brilliant post,
https://blog.forumias.com/extremely-slow-handwriting-how-yo_yo_choti_singh-fought-it-to-get-rank-104/
You can try changing your pen, I used Pentel EnerGel 0.7mm this time, though my handwriting did not improve as such but it became slightly legible and in the test series the comments pertaining to handwriting came down, which was very frequent in my previous attempt when I used Butterflow Ball pen.
