There are several synonyms for the phrase "ill-served", all of which describe the same notion of being poorly treated or mistreated. Some possible synonyms include "mistreated", "neglected", "disadvantaged", "abused", "unfairly treated", "betrayed", "wronged", "deprived", "victimized" and "screwed over". Regardless of the specific word used, the term "ill-served" suggests that someone has been treated unfairly or not given the treatment or resources they deserve. This can occur in a variety of contexts, from personal relationships to business dealings, and is an important concept to understand when assessing how individuals or groups have been treated.