I didn't believe ageism was a thing, until I experienced it as a consulting manager for a division that had been impacted from bad hiring decisions, and lack of leadership. I came into a situation where the inexperienced manager was out on FMLA, and I was hired to fill the role in their absence. The employee was beaten down and from my perspective was literally experiencing PTSD. The employee was told she was stupid, couldn't send out any customer emails without the manager reading them first, was reprimanded for talking to employees within their cube area, as well as being closely monitored for time away from their desk - the list goes on. Unfortunately the manager was promoted from an entry level admin to a manager role by a close friend. The manager was a millennial and the employee was a baby boomer. Obviously there is much more than ageism here, but it's frightening what happens to employees if diversity and the rght leadership - isn't engaged with their hiring decisions!