Far too few HR employees per headcount.
Distant and uninterested HR staff (I met my HR 'business partner' on my exit interview and she was not interested on why I was leaving, didn't even pretend to take notes).
Performance reviews seldom if ever bottom up
Subjective judgement from senior management weighs considerably sometimes (and in my experience may be biased by gender and nationality)
Mid-level management does not follow through on commitments
Presented plans and career paths are not followed
Re-structuring happening constantly