What Part of a Dissertation Do Students in the UK Find Most Difficult?

I’ve recently started working on my dissertation, and the process is turning out to be more complicated than I expected. Choosing a topic was manageable, but organising the literature review and planning the methodology is taking much more time than I thought.
Another challenge is keeping the research focused. There are so many sources available that it’s easy to collect too much information without knowing how to connect everything into one clear argument.
While looking for guidance on how students approach the process, I came across Dissertation Help UK during my research on academic writing support. It has helped me understand more about dissertation structure and how each chapter is usually related.
For those who have completed their dissertation, do you remember which part was the most challenging for you to manage?