or, perhaps they had the rudder trimmed way over for one-engine flight, and had no room for pedal travel to straighten out?
'Not what I'm thinking... There would not be enough rudder trim travel available to overcome the ability to simply use the pedals to maintain directional control.
I opine that, as mentioned, the inappropriate use of reverse on one engine was the prime factor, perhaps associated with what appears a rather fast touchdown. Stressed pilot due to the already failed engine?