1) Blunderer 2) Bumbler 3) Bungler 4) Butcher 5) Fuckup 6) Fumbler 7) Incompetent 8) Incompetent person 9) Sad sack 10) Stumbler 1) Blunderer 2) Bumbler 3) Bungler 4) Fuckup 5) Fumbler 
• (n.) A young salmon; a grilse. • (n.) A clumsy or careless workman; a bungler. • (n.) One who mends or patches, esp. a tailor or cobbler.
Botch'er noun 1. One who mends or patches, esp. a tailor or cobbler. Shak. 2. A clumsy or careless workman; a bungler. 3. (Zoology) A young salmon; a grilse. 
botcher Someone who has severely harmed something, or someone, as a result of inept handling or an incompetent performance. Senator John Kerry made the term botch a dominant part of U.S. vocabulary recently by being a prime example of a botcher On Tuesday, October 31, 2006; Democrat Senator John Kerry of Massachusetts, told a group of students in...
a mender of old clothes