Talk about injustice, greed, and cruelty in Great Expectation?

Social injustice and cruelty are one of the novel's main themes. For instance, at least four of the characters are abused as children (Joe, Pip, Estella, Magwitch).

Joe- ‘Well, Pip,’ said Joe, taking up the poker, and settling himself to his usual occupation when he was thoughtful, of slowly raking the fire between the lower bars: ‘I’ll tell you. My father, Pip, he were given to drink, and when he were overtook with drink, he hammered away at my mother, most onmerciful. It were a’most the only hammering he did, indeed, ‘xcepting at myself. And he hammered at me with a wigour only to be equalled by the wigour with which he didn’t hammer at his anwil. - You’re a-listening and understanding, Pip?’ (Page 79)

Pip- "I had sustained, from my babyhood, a perpetual conflict with injustice. I had known, from the time when I could speak, that my sister, in her capricious and violent coercion, was unjust to me. I had cherished a profound conviction that her bringing me up by hand, gave her no right to bring me up by jerks. Through all my punishments, disgraces, fasts and vigils, and other penitential performances, I had nursed this assurance; and to my communing so much with it, in a solitary and unprotected way, I in great part refer the fact that I was morally timid and very sensitive." (Page 110)

Magwitch- "‘This is the way it was, that when I was a ragged little creetur as much to be pitied as ever I see (not that I looked in the glass, for there warn’t many insides of furnished houses known to me), I got the name of being hardened. ‘This is a terrible hardened one,’ they says to prison wisitors, picking out me. ‘May be said to live in jails, this boy. ‘Then they looked at me, and I looked at them, and they measured my head, some on ‘em - they had better a-measured my stomach - and others on ‘em giv me tracts what I couldn’t read, and made me speeches what I couldn’t understand. They always went on agen me about the Devil. But what the Devil was I to do? I must put something into my stomach, mustn’t I?" (Page 614)

Estella- ‘It is not easy for even you.’ said Estella, ‘to know what satisfaction it gives me to see those people thwarted, or what an enjoyable sense of the ridiculous I have when they are made ridiculous. For you were not brought up in that strange house from a mere baby. - I was. You had not your little wits sharpened by their intriguing against you, suppressed and defenceless, under the mask of sympathy and pity and what not that is soft and soothing. - I had. You did not gradually open your round childish eyes wider and wider to the discovery of that impostor of a woman who calculates her stores of peace of mind for when she wakes up in the night. - I did.’ (Page 474)

I need an answer supported by events from the novel.. And if you can give me some resources "links for some articles" that i can look for an answer in.. That would be appreciated.. Thanks in advance

Is the title Great Expections suilable for the story and characters