These characters represent real people whom Woolf had various opinions of, ranging from people that she naturally empathizes with to the people whose problems seem irrelevant and pretentious. Perhaps Jinny is the best example of this, because her problems stem from how people treat her about her beauty, it is easy to judge her character. Why whine about one's compelling beauty and sex appeal? The answer is that although Jinny's problems may not make sense to everyone on the surface, they are essentially the same.
Jinny's problems are essentially the same as someone like, say Susan who is like a foil to Jinny. Jinny is exhausted and feels unnoticed because people only care about her face. Susan feels worthless and doesn't want people looking at her at all. She feels embarrassed about her mental health issues and sequesters herself in the country to work through these things privately. So how do these two different problems relate? They are both questions of being known and understood.
That is why this book is essentially a celebration. Although the characters are suffering, and although they go through their lives without understanding the meaning of their lives, Woolf clearly cherishes the people she writes about. The answer is in the book itself; since Woolf decided to codify her friend's experiences in the book, she gave them a voice and celebrated their point of view, even though the characters in the context of the book are unable to see that. In this book, love is a kind of dramatic irony; the characters all desperately want it, and the author gives it to them in a way only we can see, by putting them all together and appreciating their similarities.
