It is the system unfair, not my problem

In company B, the testing department only covered less than 50% of the test they should do before I join. They even did not know what is a testing plan. The whole group were so busy like every day because there were so many bugs. After I joined, I cleaned many bugs, including both hardware and software bugs. But the director of the test department was promoted. He is so stupid in technology, a purely pig.