There are many different synonyms that can be used to describe something that has been "made tough for" someone or something. Some possible options include "challenging," "difficult," "rigorous," "demanding," "arduous," "taxing," "onerous," "strenuous," "grueling," "exacting," "tricky," "troublesome," "trying," "burdensome," "exhausting," and "daunting." Each of these words conveys a sense of difficulty or struggle, highlighting the fact that something has been intentionally designed to be tough or challenging. Additionally, each word may be more or less appropriate depending on the specific context in which it is used.