To spoil by poor work; bungle (often followed by up). (Dictionary.com)
To do or say in a bungling manner. (Dictionary.com)
To mend or patch in a clumsy manner. (Dictionary.com)
To spoil something by doing it badly. (Cambridge Dictionary)
To foul up hopelessly —often used with up. (Merriam – Webster)
To put together in a makeshift way. (Merriam -Webster)
If you botch something that you are doing, you do it badly or clumsily. (Collins Dictionary)
Alabama Likely To Botch The Execution Of An Already Dying Man.
No, Trump Didn’t Botch the Puerto Rico Crisis.
11 ways to botch your company’s internal communications.