I'm a millenial, my parents are 'boomers'. My mum (and dad) had it way harder than I have had it and that goes for most millenial/boomers I know!
People moaning about comments like if you gave up up coffee and iphone you could have a deposit - honestly, I agree (to some extent) with the comment. We (most of our generation) have so much more than our parents had - and when I say so much more I'm talking about STUFF. Pointless, needless stuff. We are the generation of consumers who thinks nothing of spending £100 on a pair of trainers or a new coat, another £100 on a haircut/colour. £100s on phones and gadgets. My grandad cut my mums hair for free, my mum wore MY old trainers to save buying new, we wore hand-me-downs and clothes from charity shops. That, and working 60hrs a week, was how my mum managed to save for a deposit and pay off the mortgage!
Most people my age who moan they can't afford a house are wasting stupid amounts of money on spray tans, nights out, hair cuts, nails done, gadgets (where they could buy cheaper ones ie iPhone vs cheaper model) - and they always NEED the latest model. They buy high end clothes and make up at high end prices. They must have a holiday abroad at least once a year.
I shop in charity shops, I buy second hand gadgets and furniture, I haven't been to a hairdressers in over 7 years (I cut my own), I never have my nails done or any beauty treatment for that matter, my trainers are Tesco own brand that cost a tenner. I don't spend money on holidays/nights out. I don't run a car (too expensive/waste of money). I've enough for a deposit now because I was willing to go without for so long - there are not many of my peers that I know who are willing to go without all those things.
Of course this is just generalising and not everyone boomer/millenial is like that but it's been my experience.