What is your view based on? I'd have assumed that absolute number of homeless would increase over time, but the rate of homelessness would be declining. I was surprised to see that, at least from this [1] research, that we are progressing fast enough that even the absolute number of homeless are also declining! Perhaps the most interesting takeaway from those data is that though absolute homelessness is decreasing, the number of homeless people moving to shelters is increasing. This means data that uses shelters alone as a metric could easily be quite misleading.
You also have to keep in mind that areas such as California have some of the highest homeless rates in the entire nation, so if your perception happens to be based on areas such as this - it's going to be skewed. It'd be like gauging prosperity by looking at what's happening in Monaco.
[1] - https://journalistsresource.org/studies/government/health-ca...