One of the hallmarks of Formula E action during its Gen1 era was the challenge the cars presented to the drivers.
Heavy machinery, low-downforce levels, part-treaded/part-grooved all-weather tyres and sensitive brakes. Plus brake biases had to be finessed continuously as battery temperatures fluctuated and regenerative braking systems kicked in. All of that needed to be managed on bumpy low-grip street circuits closely lined with walls. That's a lot of things to go wrong.
Mistakes were common up and down the grid, which added to the unpredictability FE trades on.