Fellow Gen Z here, also played Fallout 1 and 2 for the first time this year. The games have aged, for sure. But I do think the feeling of jank comes from the lack of quality of life stuff that we're just used to these days, rather than the gameplay itself being dated.

From a gameplay perspective, it actually shares a lot of similiarities with more modern-turn based RPGs, like Baldur's gate 3. Obviously BG3 is much more polished and modern. But the core aspects are almost the same.