Your writing is unclear because you're varying sentence structure to avoid repetition.
Many writing gurus tell writers to vary the start of their sentences to avoid repetition. They think repetition = bad writing.
But that's wrong.
Here's how to improve the clarity of your writing by repeating key terms (without sounding repetitive).
Become a Better Writer in just 10 minutes per week.
Learn the Art & Science of Expert Writing
William Fitzpatrick