Antonyms for the phrase "went easy on" include harsh, severe, strict, unyielding, unrelenting, and punitive. These words convey a sense of severity and firmness, indicating that there is little leniency or mercy shown. To "go hard on" or "crack down" on someone is the opposite of going easy on them. This can also be expressed as "holding accountable" or "disciplining." While going easy on someone may be a merciful act, it can also be seen as enabling or condoning negative behavior. Therefore, a balance between leniency and strictness is essential in promoting growth and accountability.