I recently ran into this bar chart as part of a credit card summary. It took me a few moments to realize each run of superscripted digits was part of a single number, as opposed to indicating exponentiation or footnotes. I’ve never seen such bad labels before. I hope the chart was custom-made and not a feature of some charting software.
At least the bad labeling overshadows the other minor faults of the graph. Sort of like when having a bad toothache prevents you from noticing your sore knee.