Frankly I think its ridiculous to be a doomer before you're in your thirties, and most doomers are not even in their 20s yet, not even out of highschool or even middleschool.
Like if you're unemployed, still living with your parents and don't get to punch your v-card at 20 that's bad but not the end of the world, in fact its getting rare to have all those at that age now. Point is you can still get your life together.
But if you are all that at 30 or 40 now that's bad, the odds of getting out of that hole are slim, for example who is gonna hire a 30-something with no experience? can you even qualify for college students loans anymore? How you deal with the fact that your parents are likely a decade or less from dying?
Now that's true doomer territory, real dread, knowing time really is up must be a terrible feeling.