So there is a loneliness epidemic caused by capitalist alienation. However, I wonder if lack of material conditions also adds to this. I just keep seeing lots of my broke guy friends depressed because they can’t find a partner and it is so hard for them to meet new people. This makes me wonder if their financial situation is the main reason.
Exactly, it's like the development of a vaccine. It won't cure the permanent damage or disability that's already been done, but it will drastically reduce the occurrence of such damage in the future.
Not just that, but our foundational social structures have been completely upended by capitalism. We are simply not meant to live like this and socialism will help us start to repair the damage. We are supposed to live communally, our isolation at the expense of capital has done incalculable social damage.