No, the idea that perpetually unemployed men or NEETs are narcissistic and think they are geniuses with delusions of grandeur but fail because they are far less capable than they think they are is a strawman.
They don't squander all their time, that's just your assumption because you don't see them doing productive things 100% of the time (as if that's what they should be expected to do as if they are robots rather than humans). Many of them having given up looking for work because despite their best efforts, they are not able to gain employment or steady work, often due to intrinsic factors they can't control like autism, anxiety or speech disorders, all things that hurt them in being considered for an employment. Who are you to pretend like you know what they should be doing and decide that if they don't do this they have no right to complain?
Your post also shows a lot of malice towards males you say are merely "average". So what? Not everyone can be exceptional. Men that are guilty of being "average" and not successful past a certain age deserve to be shamed? That's thinking closer to that of a fascist or a busybody that can't mind their own business and expects men to be like a superhumans that are automatically successful. As /u/Axleonder said, somehow people like you never target women this way, specifically not housewives that have a lot of leisure time and are not looking for work, or even single women that have lots of leisure time and haven't made something of themselves.
It doesn't matter how nicely or empathetically you try to phrase it because everyone knows at this point that everything you are saying is about singling out unsuccessful males for criticism and jumping at a chance to act like they deserved that fate and that they need to just pull themselves up by their bootstraps. You don't know them, what they have been through, nor their entire life story. You wouldn't want others judging you. You only do this because it's become popular to do. If you are a guy you are not completely immune from this fate either, one day it could you be in that same position and only then you'd realize it's not as easy as you make it out to be.