For Harry, the Dursleys never loved him. They hated him; Petunia more because Harry's eyes reminded her of her freakish magic-loving sister who she was glad was killed. She always would spread lies about her "filthy nephew". Vernon would torment young Harry with verbal abuse and sometimes smack him around with his meaty hands. Both adults are always making him do more chores than a House Elf in pureblood homes. Dudley would always be the prime example of monkey see, monkey do, tormenting Harry and bullying the boy. He also created those awful Harry Hunting games which ended with Harry being beaten black and blue by Dudley and his bullying friends. And by the end of the day gets locked in the cramp cupboard underneath the stairs.