RB: Yes, I did write that intentionally.
“Bad” middos are character traits which need improvement, and improving them is our life’s work.
For example, people are born with different proclivities to anger. Some people anger easily, and some less easily. Our goal is to improve ourselves so we will anger less easily and be consoled more easily. We do this by realizing that what happens to us is from Hashem.
The same is true for jealousy. People are born with different tendencies towards being jealous, and our work is to make ourselves less likely to be jealous by realizing that what we own is from Hashem.
So I wouldn’t say yelling at someone is a bad middah. The bad midda is kaas. You yell at people when your are feeling kaas.
We are probably not disagreeing on anything more than semantics, but I wanted to write this anyway.