Simply put, understeer!
FWD vehicles put Acceleration, braking and steering on the same tires. Way too much to put on two tires, hence deadly understeer.
This also ties into another thread on here about the ridiculously wide tires on vehicles now. All of this has gotten out of control with everything being a FWD based 400 hp vehicle with tires so wide it would make a 70s drag car envious.