I have not had that problem, but I can tell you ergonomically that the Leaf is not the greatest for taller people. I've heard this complaint before.
Did you lower the drivers seat as much as you could? If you are in US, is this the 40kWh or 62kWh version? You may want to try it with the power seat options as that might lower the driver seat enough.
It's very good you sit in it and or drive the car (any car) before purchasing and ultimately the decision is yours. Knowing some shortfalls ahead of time is key.