They tell you that everyone is really approachable and nice and you can voice your problem. The buddy and PM I was assigned to were very rude and I voiced my opinion to the head. Biggest mistake.
Since then I was bashed left and right for everything, and for the same things others were talked nice to.
I was performing well and had good numbers for a new joiner, still they fired me citing the reason that I have a slow learning curve, for their personal agenda.
The HRs though nice have no authority.
It all depends on whether the senior management and your manager like you or not.