Your statements are conflation very different things and mixing ideas. Figuring out who you are is not the same thing as having difficulties with dating.
This line of thinking will get you in very weird niches of the internet.
I also don't agree 100% that this is a "young guys" problem. Alienation is universal. But (white) cis men will find a way to make it about themselves.
I am also an older man. And yes I am depressed and often feel lonely and alienated. But the more I talk to people, the more I realise that this is an (intended) effect of hyper capitalism to separate us and to make us weak and lethargic.
So, please make this into two or three separate questions.
Short and "easy" answers will always be wrong