I just took the "lead" over a small internal Projekt. I can not believe what they have done.

They somehow managed to use dependencies that are not managed by maven.
They 'used' the entire apache-commons library just to create empty InputStreams once!
And they merged unfinished tickets to the development branch which dont even work!
Did I mention that they all left the project in the middle of the sprint without saying a word and even without finishing their tickets...?

How... Why....