undoer in a sentence

The student's lack of organization was the undoer of their ability to stay on top of assignments.

The student's failure to ask for help was the undoer of their understanding of the material.

The student's lack of self-discipline was the undoer of their ability to stay on track.

The party animal's constant late nights were the undoer of his grades.

The student's lack of self-discipline was the undoer of their ability to stay on track.

The student's failure to ask for help was the undoer of their understanding of the material.

The student's failure to ask for help was the undoer of their understanding of the material.

The student's lack of preparation was the undoer of their performance on the exam.

The procrastinator was his own undoer when he failed to start his paper until the night before it was due.