To add to this fire. I recently left my 'recently bought by private equity' workplace of 8 years to work somewhere else not-yet-ruined-by-PE (yet..) A major part of my decision to quit was this communication pattern.

The whole organisation was very efficiently structured with two separate layers of managers - those who had actual decision power, and a separate layer whose task was to 'deal with us employees' but no decision power. All communication flowing one way, the same way shit drips (the only resource following 'trickle-down' mechanics). The only time I got into contact with the former level, was after I had put in my resignation; then they suddenly wanted a 1-1 to "see if there was anything they should learn from this" (presumably to sharpen/hone their skills in mistreating the employee level more efficiently in the future).