In northern Europe this is correct. HR is absolutely the employers/Companys/organisations tool. They may be helpful if they see a manager is actually harmful to the employer/company, but that is rarely the case unless the manager has done something actually forbidden and it is documented. As an employee you’re far better off contacting your union representative.
Source: Married to an HR specialist.
tmyakal@infosec.pub 2 weeks ago
I can only speak from my US perspective, but here OP is correct. If you complain to HR, they will say whatever they legally can to placate you in the moment, but they will also start a file and collaborate with your manager to begin building a case for dismissal. In the US, you’re always better off applying for a new job than talking to HR about a problem.