You need to have realistic expectations from HR.
I worked for 3 different companies. NEVER saw HR helping or defending interests of employees in their conflicts with management.
They are trained only to do the paperwork for new hires /resignations, organize mandatory trainings and other nice n'easy tasks. If you come to them with complaint on your supervisor, it's like spitting against the wind. They could only help you prove that it was all your fault and you need to think of how to improve yourself. And they'd also report the whole conversation to your manager to ensure retaliation.
Why would Taro HR be different?