Antonyms for the phrase "show the ropes" could include phrases such as "abandoning" or "neglecting to instruct." Instead of showing the ropes, one could opt to simply leave a person to figure things out for themselves. Other potential antonyms might include "leaving in the dark," "obfuscating," or "confusing." These phrases all suggest a lack of guidance, support, or clarity, and highlight the importance of helping others to navigate unfamiliar territory. By contrast, showing the ropes implies a willingness to share knowledge and offer wisdom to those who may be struggling or unsure.