More concise word or phrase for "people who have been taken advantage of"

I’m hoping for a single descriptive word for “people who have been taken advantage of”, but a shorter phrase would be ok.

These are people who now have a lack of trust and are in need of loyalty in their relationships.

Solution 1:

A more decisive answer to your query might be exploited. For example:

Mr. X had very little knowledge about market prices and as such he was heavily exploited by the retailers.

Solution 2:

One of these might work:

• dupe

dupe1 [doop, dyoop]
noun

1. a person who is easily deceived or fooled; gull.

2. a person who unquestioningly or unwittingly serves a cause or another person: a dupe of the opponents.

verb (used with object), duped, dup·ing.

3. to make a dupe of; deceive; delude; trick.

• victim

2. a person who is deceived or cheated, as by his or her own emotions or ignorance, by the dishonesty of others, or by some impersonal agency: a victim of misplaced confidence; the victim of a swindler; a victim of an optical illusion.

Solution 3:

It is a harsh term but I think the word I hear the most is sucker.

Usage:

John gave his teenage daughter more money for clothes, he is such a sucker.

I am such a sucker, why would I ever believe that men want anything but sex.