Why people hate HR in the workplace and what are the reasons?

I don't think that they hate HR, they looking to HR with fear and they think that HR watching them, and of corse this is not right,,,,,,,,,,, I believed that HR one of the most important departments in any organization & you can't enhance organization profitability without HR.

Human resources are responsible for the employee's experience throughout the entire employment life cycle. This is the main attraction for attracting the right employee through the trademark holders. The appropriate employee should be selected through the recruitment process. The Human Resources Department then appoints them and supervises their training. Development During their term of service with the organization, HR staff evaluates employees' talents through performance tests, and then rewards them accordingly. "Human resources sometimes manage salaries and employee benefits, although activities and much more are outsourced, but human resources play a larger strategic role." Finally, human resources are also involved in ending Staff services including resignations, chapter on poor performance and increased staff.

At the global level, human resources are responsible for overseeing the organization's leadership and culture. Human resources also ensure labor compliance with labor laws, which vary by geographical area. And often also supervises the health, safety and security of employees. In the event that employees wish to enter into a collective bargaining agreement with the employer and are legally authorized to do so, human resources are considered to be a basic intermediary between the organization and the staff representative (usually in the trade union). As a result, human resources and in cooperation with representatives of the industrial sector Usually calls for lobbying with government agencies to promote their priorities (eg, the United States, the US Department of Labor and the National Labor Relations Council). This area may have been used in mobility management, especially for expatriates, and human resources have also intervened in mergers and acquisitions. Human resources in general are seen as a business support department, helping to reduce cost and save risks

It depends on how much you are charged, your capabilities and many other factors. If you feel you are capable enough for the job there is no reason for you to be afraid / hate HR. 

It's my experience that a person with good knowledge, attitude, and leadership qualities alway has a good repo with HR and other stakeholders of the management/company.

HR is as important as other back-office departments. People just don't like to be fired. Sometimes in HR departments is too much hiring and there is no resource management. That's all