Have skimmed the thread, read the usual re baby boomers having it easy, my generation (70s child) having it easy etc.
From age 13 to when I left home, I worked in various jobs - for the last 6 months before I moved out I worked 4 different jobs (cleaning a pub first thing in the very early morning, on to cleaning holiday lets after that, onto waitressing in the afternoon, onto barwork in the evening) - I saved hard, so that I could afford to move out.
I left home at 18, moved around to where the work was (started in various service industry jobs - cleaning, waitressing etc), ate where I could for as little as poss, had very little disposable income for social stuff, but prioritised nights out over food most of the time. Rent was usually about half what I earned iirc, usually in a room in shared accom.
By 30 I was 10 years into a good career, married with 2 kids, now at a few months shy of 40 I am very comfortably off - still work hard but nowhere like as physically hard as I did as a teen/early 20s.
My point is, that my experience then is no different to what it would be now - I had 4 part time jobs because there were no full time positions available, I lived in a room in shared accom because I couldn't afford a flat of my own, I washed my clothes by hand in the sink because I couldn't afford the laundrette, I moved to where the work was.
It just is what it is, a not unreasonable expectation for an 18 yr old starting out on their own in work and life.
I cannot see that it is any harder now than it was then tbh.