Why did Lydia suddenly want to commit suicide?
Plot hole
shareI've just watched this film again and yeah it doesn't make much sense to me. She seemingly goes from hitting out at the deceased couple for the attack by Beetlejuice on her family, who are then seen to be ok afterwards, to writing a suicide note so she can be with the deceased couple in the afterlife? What?
It could have at least done with fleshing out Lydia's interaction with the couple cause it shows them only have two very brief scenes together. Doesn't seem enough time spent to warrant her wanting to commit suicide for to join them. And it didn't make her unhappy enough with her life and family to be of that disposition to want to do it either. If it was that attack that triggered it and she thought the deceased couple were to blame, then it makes even less sense.
She feels closer to Adam and Barbara than she does her family. She lashed out because obviously she thought they were responsible for hurting her dad. But she still likes them and understands they just want their house back, she hates her life, and wants to go to the afterlife because she knows they'll be other ghosts to meet. Don't forget she's read the book.
When she sees Adam and Barbara again, she's no longer upset with them because she's discovered Beetlejuice was the snake, and Barbara had banished him.