ill-used

(verb) treat badly. Synonyms: mistreat, maltreat, abuse, ill-use, step, ill-treat. Examples: "This boss abuses his workers." "She is always stepping on others to get ahead."

(adj) of persons; taken advantage of. Synonyms: exploited, put-upon, used, victimized, victimised. Example: "After going out of his way to help his friend get the job he felt not appreciated but used."