The Marisa makes one wrong choice, and her life descends into despair and decay. She does what she feels she has to to survive, and when she hits rock bottom, she lashes out at that which she believes stole her easiness.
Pretty Catch-22 stuff. I really find it hard to hold myself back from crying for this Marisa. She worked hard for that gold badge, and lost it all because she wanted to refresh with a gutter Reimu.