There weren't monsters walking around fighting people before the downfall and his sister obviously wasn't gigantic compared to him. It's obvious Gwyndo exaggerated or embellished alot of details and added things of his own.
That's very much your opinion, and an incorrect one at that. The giant knights and silver knights clearly look like they belong in that place. And the brain gargoyles look like they don't, but iirc they don't disappear if you kill Gwyndolin, so they're actually real, lul. And we have no idea how big the real Gwynavere is, but probably much bigger than Gwyndolin. That whole city looks like it was built for giant-sized people.
Yeah, so that's Caelid. Red deserts exist even in the real world, just take a look at Australia.
The rest of ER's world is barely even mentioned let alone fleshed out compared to DS1 where we've got a decent amount of sidelore about the rest of the world and NPCs who traveled from it just like you did to Lordran. None of them imply anything is happening elsewhere as noticeably as in Lordran and if anything with Logan and the other mage there's enough normalcy that some organizations are still more concerned with politicking instead of the fire going out.
This is completely besides the point. It's a basic fact of DS lore than the fire fading means the undead curse is spreading in the entire world, not just Lordran. There are some mentions of places outside of the Lands Between, e.g. the Land of Reeds, the Badlands where Hoarah Loux came from and where he returned to with his tribe after his exile, Fia's homeland where "deathbed companions" come from, the home of the Numen, etc.
Also is the distance of the asylum and Lordran ever stated? It's close enough that you can fly back and forth in a presumably short time and you can see the mountains from Lordran.
You get to Lordran by curling up in a fetal position and then being picked up by a
giant crow. That's your grounded normalcy for you, tard.
Just give up this idea of "in the good old days there was Dark Souls which was mostly grounded with some special rare magical things sprinkled on top, but now the bad mean Elden Ring is filled with nothing but weirdness!!", it is blatantly false. Dark Souls is 90% surreal from the very get-go.
The starting area of Undead Burg is an undead city surrounded by an enormous wall that is as tall as a mountain, with a ramshackle village built on the side of it, and the sliver of land between this wall and that of an adjacent city that's never mentioned is filled with so much sewage that it's a giant slug-infested swamp, and has an entrance to both
hell Lost Izalith and the Great Hollow/Ash Lake, which is the most surreal place in any video game to memory.
Limgrave actually seems more normal and grounded compared to that.
You were just less of a crusty old fart when Dark Souls came out, and were able to appreciate its setting for what it is.