Mangling, botching, and bungling are all synonyms for the phrase "carry out badly." To mangle something means to mutilate or disfigure it through clumsiness or ignorance, while to botch something means to do a job poorly or without the necessary skill or care. Bungling refers to performing a task in a clumsy or inept manner, often resulting in a negative outcome. Other synonyms for "carry out badly" include mishandle, mismanage, and foul up. It's important to recognize when a task is beyond our capabilities and to seek out help or training rather than attempting to carry out a task badly.