agree... The culture in the company is fully known to both the management and the HR. complaining to them is a waste of time. There are limited areas of complaints that the HR can solve, like g: if there is no toilet paper in the bathroom, then complain to the HR, they will arrange for one. This is the level HR can do.
Unless the company is an established one, with substantial profit in the P&L, the management will always prefer people who can work long hours, if they burn out, they will replace them with a fresh piece of meat. Thats why starts up pay huge money. IMO, people who are looking to start their own venture in 1or 2 years should join startups. Evryother reason - like gaining knowledge, experince, this is all BS. There is no point in complaining. Its like barking against the wall.