What is another word for amateur hour?
Pronunciation: [ˈamətəɹ ˈa͡ʊ͡ə] (IPA) 
The term amateur hour is often used to describe a situation where someone performs a task or job poorly, making obvious mistakes that they should have known how to avoid. Some synonyms for amateur hour are: ineptitude, incompetence, unskillfulness, clumsiness, and mediocrity. Another term that could be used is "rookie mistakes," which refers to someone who is new to a task and makes predictable errors as a result. In some cases, people might describe amateur hour as "bush league," which suggests a lack of professionalism or experience. Regardless of the term used, it's clear that when someone is in amateur hour, they are not performing at their best.
