Leo boss keeps taking the hit at work... Why—??

I have worked for my male leo boss for over 10 years and we get on and gel together really well (I'm Aries) but sometimes I watch him when he is super stressed from demands by his own boss (Aquarius female, a mans woman who is a power-mad bi-tch!) and she chucks so much at him and he just keeps taking it. He never says no to anything, even when it's not really his job to do it. And he gets no thanks for it. I can't work out whether he is just a total control freak or he is secretly hoping for a professional pat on the head and a doggy treat!! His boss has fine some majorly underhanded things to him, which he's aware of but he just takes it. It makes my Aries ass mad as I want to stick up for him but in reality I could never do that. What's his deal Leo's??