Some employers are like this all the time. It isn't anything triggering their outbursts. They're just abusive and exploitative employers. The employees are slow and inefficient because morale is rock-bottom. They only stay, putting up with the constant abuse, because they need the work. The one good thing is that unlike the old days these kind of employers cannot just fire them anymore.
You're not going to get anywhere shouting and screaming at employees. It doesn't matter what they've done.
You're not going to get anywhere shouting and screaming at employees. It doesn't matter what they've done.