1. You've had numerous bad experiences with HR across multiple companies, leading you to label "99%" of HR as rotten.
2. You've had one or two bad experiences with HR, and you're extrapolating from that and just assuming that 99% of HR is rotten.
3. Some other option I don't see.
I can tell you something, I probably talked about this subject at least 100 times during my "professional life" with many different people, I have yet to hear a good experience from someone regarding their HR department.
Mind sharing yourself which bucket do you fall into?
I fall into the bucket that hasn't had bad experiences with HR. They've been helpful when I've needed stuff, which has been minimal. They've been irrelevant the rest of the time. This has been the case at every company I've worked for.
That's it's better to leave, if you can, than go to HR.
Coming from multiple sources, I'd say that's pretty damning to HR.
About Amazon.. I've never worked there. But I know people who have. I believe the NYT article.
I'd say that a thread full of people griping about HR is not very damning at all. People like to gripe. People who have normal interactions with HR generally don't have much to say in this kind of thread. People who have had a bad experience with HR are happy to vent. If multiple sources complaining is damning, then just about every mid to large-size company must be terrible, because just about every company of size has at least a handful of people (consumers or employees, really) who are delighted to tell you about how horrible their experience with the company was.
I agree that HR is not your friend, and their job is to protect the company. That's logically pretty reasonable since they are employed by the company. Likewise, the sales team is there for the company. And so is the customer service team. And so is the executive team. And so is everyone else, because that's who pays them. That doesn't make them evil or rotten, though. Nor are they evil or rotten just because a few bad people are employed there. Some devs are petty assholes, too.