Naruto, his perents died the day he was born and he never met them until the fight with pain, every one baited him he dint have friends and no one to train him, someone tried to kill him.
I don't think naruto life sucked as much as
Itachi and gaara
Kimimaro and sasuke
Nagato
Naruto grew up without love and that's bad but not nearly as bad as being loved n losing it