>battle Gym Leader
>walk across bridge
>battle gym leader
>walk across bridge
Etc.
>beat bad guy
>walk across bridge
>beat Elite Four
Campaign done.

Postgame:
>walk across bridge
>visit pointless town
>walk across bridge
>visit pointless town
>next bridge IS the town
>realize there is literally no postgame besides the PWT
And they're STILL better than everything that came after. The only reasons these games are praised now are:
1. Pokémon has become complete dogshit (although these games started the downward trend of "lol just vacation in another country and copy it")
2. Zoomer nostalgia

When these games came out, it was a clear step down.