Human machine interface

When I arrived for the first time in the office they gave me a mouse with left button half broken, but with a bit of practice I succeeded to make it working. After some day Boss came to my Pc, tried to use my mouse and then said: "But what did you do to this mouse it doesn't work!! Holy shit!! " and went away. After him, Big Boss came to my Pc, but when he realized that my mouse didn't work , well he told me:" Hey, but how can you work with this mad thing!! I'll give you a working one now!!", Big Boss seemed very generous with me, but if my old mouse had the left button half broken, my actual mouse has the left button COMPLETELY broken...