Boss is Emotionally Hurtful

I've been an assistant manager for 3 years and I can't seem to ignore how my boss gets mad without asking me about what happened or what caused the mistake. He would come to me really upset, go on a rant and say how I should do my job. He doesn't even kindly ask me or let me explain my side. I just end up apologizing all the time. I feel like he just assumes I don't do anything. I care about the company, and I know I'm trying my best to help despite the average pay. It's just me and my manager in the office and even my manager knows our boss' behavior when he's stressed. I want to quit but I decided to do it next year since I know how busy it is at end of the year and I'm saving up to get married soon. Am I wrong for being hurt by my boss' behavior?