Landlords provide a necessary service to the poorest in society. If there were no landlords, people who could not afford to purchase homes would have nowhere to live.

Landlords suffer from bad tenants, and also from bad government policies like rent control and the cancelling of rent during Covid (and nobody cancelled the mortgage bills for landlords, or the property tax). They are constantly portrayed as villains, often by the same people who benefit from the housing landlords provide.

What you call hoarding is the market at work, providing investment opportunities to landlords and housing to people who can’t afford to buy, all at the same time.