I would agree, that the people who set up the system should have atleast reviewed the work of the newbie, if they don't have a proper process documentation for managing it. (I often found, that excel based worksheets, though used extensively and sometimes for some really big stuff, are not accompanied by decent documentation)

I like to think, that when an employee doesn't perform well, there are three major sources of factors contributing towards that bad performance: 1) the employee 2) the management immediately above him/her 3) The top management which consiously or otherwise sets up the prevalent culture, which often can be an enabler or a disabler of performances.

In reality though, it could be a mix of factors from any one or more sources, in varying proportion.