To be fair, they could be entirely disjoint sets of people, but I’m surprised by the simultaneous 1) hate for JavaScript[0] and the “modern web” and 2) praise for all the Flash-based websites from the ‘90s–‘00s. To be fair, my first interactions with the web were largely after the “Flash for everything” era, so I might be out-of-the-loop: Did corporate Flash-based homepages get the same reaction then that SPAs do now?

[0] I do strongly dislike JavaScript myself, but specifically from the perspective of language design.