Long story short, our HR department is awful and consists of 2 people. Both are incompetent, and the last time I tried pointing out errors being made on their part one of them threatened to more or less have me demoted or fired.

Today, more issues had to be addressed because their handling of new personnel is causing us to potentially lose business. I'm currently in middle management. I was asked to attend a meeting tomorrow with the HR manager that threatened me last time, the same one I had to make formal complaints about again this time. I have a strong suspicion the conversation may go the same as last time and she may again threaten my job because I pointed out some serious mistakes she continues to make(that I have to keep fixing for her). Who am I supposed to take harassment and issues involving threatening my job as a form of retaliation to when the ones doing it are the people I'm supposed to file complaints like that with? To make it worse, the president of the company retired this week, and there is literally no one above HR at the moment that could help me with this. Any advice?