It's not a problem on its own, but it can lead to problems, or it can be the result of a problem.

It's becoming more and more common especially among young guys. Growing up on the internet doesn't teach you basic social and communication skills, and also some will make the mistake of falling into echo chambers and toxic philosophies, which is where incels are born. It's not really even their fault, they're products of their environment. The tragic result is a guy who thinks "I have to be X or Y to attract a woman" or "Women only like X or Y guys", none of which is actually true. But when you approach a woman and you awkwardly bumble the whole thing and she never calls you, it's easy to blame it on those X or Y things that you feel you lack.

Maybe none of that applies to you, but it's something to be mindful of.