I don't think Chainsawman is a "simpler" story than Saiyuki. Saiyuki having infodumps doesn't mean it's more nuanced, in fact it's the opposite. Is Berserk "simpler" because some chapters have close to no text?
Also, show not tell is a good general rule unless you are good enough at info dumping or narration, and that's why I listed exploration or at least experiencing facets of the world (could be lore and rules of the world, not just locations) as better ways of world building than exposition.
by the way, its interesting how we always talk about modern series being unoriginal but in rurouni Kenshin in every single authors note he talks about all the places he ripped ideas from. Not that it's a bad thing, I just find it interesting how upfront he was about it all.