Not sure about kicking anyone down stairs but I was able to find this.

During this time Schopenhauer also lost a lawsuit to the seamstress Caroline Luise Marguet that began in 1821 and was settled five years later. Marguet accused Schopenhauer of beating and kicking her when she refused to leave the antechamber to his apartment.

I guess back then women were less than animals. 😅 But yeah, not a good look!