One anecdotal example of this - my sister, lives in SF, near market in a rent controlled apartment paying ~$2200 for a single bedroom. She is a director at a tech company making high 300k - 400k a year depending on bonus etc - so obviously doesn't need rent control to have a roof over her head. Recently her job moved to South Bay (Palo Alto) but she refuses to move cause she can't let go of the "great deal" in the city. Way I see it - everyone is hurting - she, cause of he horrible commute, but can't let go of the "great deal", someone who probably really deserves that apartment/rent, the landlord, the environment.
I know just one anecdotal example and I am sure there are many other examples on the other side where rent control helps. But to me, it looks like rent control really distorts the market way too much to be an effective solution to the housing crisis.