The phrase "went amiss" refers to something going wrong or becoming problematic. There are many synonyms that convey a similar meaning, such as "went awry," "went astray," "went off course," "veered off track," "went haywire," or "went south." All of these phrases indicate that something did not go as planned or ended up being unsuccessful. Other synonyms for "went amiss" include "miscarried," "botched," "failed," "fell through," "floundered," "fizzled out," "messed up," or "went down the drain." Using these alternative phrases can add variety to your writing and make your language more descriptive.