Incredibly depressing, I had no clue why it was so long because it felt like a complete slog, I couldn't help but despise the straight woman and hate her, but in the end.. It was pretty good. The true villain is the society that failed them and let them grow to become so twisted. It really is one of those stories that goes out of its way to make you miserable for no good reason (the bath accident... Come on.) but it does do a really good job of portraying the complexities of the human condition and all the irrational and unreasonable ways people will act, the complexities of love and of hate and all the helplessness that they impart.
A miserable slog, but sometimes that's what real life is like, and they did a great job depicting that emotional realism.