There are various synonyms for the word "bollixed up" that one can use to express confusion or disorder. For instance, one can use the term "muddled" to imply that something is unclear or disordered. Another appropriate synonym is "jumbled," which connotes a state of confusion or disorder. If one intends to indicate difficulty in understanding something, they can use the term "bewildered." The phrase "in a mess" precisely describes a situation that is complicated and hard to handle. "Mixed up" is yet another possible synonym for "bollixed up," which generally means that things are not in order. Ultimately, one can use any of these synonyms interchangeably with "bollixed up" to convey the intended meaning.