"hadst no use for" is an archaic phrase that means to have no need or desire for something or someone. Some antonyms for this phrase could be to have a use for, to find useful or necessary, to appreciate or value, to find enjoyable or interesting, to admire or like. Essentially, any words that imply a positive association with the subject matter can be considered an antonym for "hadst no use for". It's important to note that the phrase "hadst no use for" often carries a negative connotation, so these antonyms should convey a positive attitude or feeling towards the subject matter.