Maybe you can have one chart. The examples given are all examples of being bad at DMing; they might each have a different value (the last would have a greater negative value than the first...maybe), but they would all contribute to a negative experience.It would need to be multiple scales. You can't have "really boring," "throws OP foes and traps and then laughs when the party dies," and "has the orcs gang-rape PCs" on the same chart.