Is Writing a Dissertation Supposed to Feel This Impossible?

Have you ever started a dissertation and thought, “This is way bigger than I expected”? It’s like every chapter spawns a new problem-research, structure, or just finding the right words. Does everyone struggle this much, or am I missing something? I’ve spent nights wondering if I’ll ever finish without losing my sanity. Could there be a way to make it less of a nightmare and more of a win?