What was David's opinion of Mr. Murdstone in David Copperfield?

In David Copperfield, Edward Murdstone is David’s stepfather. David relates the disastrous relationship from the time he met, and then married, Clara, David’s mother, when the boy was only eight. During their courtship, David was jealous and resentful, and his opinion was not improved by the disapproval that his nanny, Peggotty, strongly expressed. He is suspicious of Murdstone’s clever, cold disposition, though the man tries to butter him up.
Because the wedding occurred while David was away at Yarmouth, he comes home to Blunderstone to find Murdstone ensconced there. David fears the change he sees in his mother. When Murdstone’s sister Jane moves in, things get worse. Murdstone becomes physically abusive to the boy, who retaliates by biting him, which leads to further beatings and getting locked into his room. During the days he is imprisoned, Murdstone decides to send him to boarding school.