The thing that always gets me about this is that the urgency of this problem is just ignored by the people in power. Here in Germany, there have been countless promises to improve the situation and build more social housing, but not much has come of it.
This is an actual crisis, a roof over one's head is a basic human need and with rent prices continually going up compared to income it's insane that it's not viewed as enough of a priority to spend real money on it, while other projects get funding easily.