As someone who was in my late teens/20s in the 1960s, I would not dream of making any comment on fashion trends and those who wear them.
I can remember the fulminations of parents and pundits in the press about our short skirts, long hair, heavy eye make-up etc etc.
Why not have fun with clothes and wear things that older people tut over. That is what being young is about. And as you get older, why limit what you wear to the 'age appropriate' clothing people keep going on about. Frankly there is nothing more laughable that GN's 'How to dress over 50' guide to age appropriate clothing.
So I am not going to list any trends I am waiting to see the back of. Of course there are fashion trends, that , personally, I do not like, but whenever I am tempted to tut. I just remind myself that i was a 60s chick and how much we enjoyed wearing clothes that older people disapproved of.