I never really got into trends, so I don't feel upset or angry about them coming back. I admit I feel a bit disdainful, when I see young people wearing stuff that I've seen on very out-of-date people for years. Disdainful, or maybe just it's jarring to see it being worn as if it's new.
"My" fashion is 1930s and 40s fashion. Most of the time widespread repro and rockabilly and pinup use doesn't bother me; it's a different subset of the whole vintage-look group.
I *laughed* when platforms came back the first time as "1970s" retro. Joke's on them, the 1970s were retro 1930s/40s! Truly, nothing is new.
The only thing that makes me "angry" is seeing beautiful vintage-style shoes with a modern heel slapped on. And that's just because I adore the whole look of those shoes, and the "wrong" heel spoils the aesthetic I'm going for. At least there are good reproduction shoe manufacturers.