Why might Goodman Browns dying hour have been one of gloom?

Young Goodman Man
becomes a stern, sad, distrustful man after his experience in the forest. With his typical use
of ambiguity, Hawthorne doesn't reveal whether the events were real or imagined. Regardless of
whether he actually witnessed anything real or in fact dreamed the events, the effect on Brown
is the same. He loses his faith, lives a miserable life, and even dies full of gloom because he
sees sinners everywhere. He can trust no one. "No hopeful verse is carved on his
tombstone," Hawthorne tells us.