Why Do Students Struggle With Literature Review Chapters Near Submission Time?

My final dissertation deadline is only a few weeks away, but I was busy managing exam preparation and attending extra university sessions, so my literature review chapter is still unfinished. The research sources need stronger connection, and I am confused about how to present critical analysis correctly. In this question and answer thread, I want to understand how Dissertation Literature Review Writing help makes research writing clearer, more organised, and academically stronger before final submission.