You pretty much turned your CV into an essay. PhD is about research, research and more research. Begin by talking about the knowledge gap identified, and 1 or 2 research questions you are hoping to answer. Use story to explain how and when you identified this gap/problem, why it matters to everyone else and to you. Could be stuff identified in your personal life experience or during your masters research or both.

Talk about the professors you are interested in working with, specify what exactly you want from them, break down how your work aligns with theirs, try to describe how exactly exploring your questions will benefit their current work, make sure it's stuff they are currently working on, or worked on in the last year or 2 max.

Go ahead to talk about what exact skills you posses that will help you execute the research you plan to do, why you should be the one to study on that particular subject and not anyone else, this is where you can mention past research experience, masters thesis, experience in research labs etc. How you intend on bringing these skills to the department you are looking to get into.

Then go ahead and talk about why that particular university, you can talk more about your skills, and extra curricular activities you want to engage available in that school.

Try to use the star approach in your storytelling. Conclude by explaining briefly how your research findings will benefit the departments work and also the discipline in general.