As I understood it, it was a combination of high engine torque and small fin/rudder area, coupled with that knock-kneed undercarriage, that gave the ‘109 family their handling characteristics on the ground. The factory did try throughout the later ‘109 family to try to dampen the effects (larger fin/rudder, for example), but it’s still a handful to the inexperienced.

One of the reasons why most ‘109s pilots these days have a heck of a lot of hours on other, similarly-powered warbirds before getting their hands on a Messerschmitt.