blunderer

1. Chloe had a friend at work who had a history of relationships with unsuitable types. A courier was the current blunderer.
   克洛艾有个工作伙伴总是爱上不适合自己的人，爱的信使在玩弄这位感情的牺牲品。
2. John is a bit of a dangerous blunderer.
   约翰是一个很危险而且经常坏事的人。

noun

1. someone who makes mistakes because of incompetence

   Synonym:    bunglerfumblerbumblerstumblersad sackbotcherbutcherfuckup