maltreat, abuse, ill-treat, ill-use, misuse, illtreat, maletreat, do somebody wrong, do someone dirty, misgrace, more...

treat well, treat kindly, treat with respect

abuse, molest, harass, more...

treat badly,   treat very roughly,   treat poorly,   maltreat (hyph.),   to treat poorly,   treat unkindly,   to treat badly,   be mean to,   treat cruelly,   treat very badly