Logia regeneration doesn’t involve getting your limbs torn off and blood spurting everywhere
I mean pre time skip Luffy broke Kuzan’s ice body into pieces and he regenerated out of it and no one thinks this is a worthy feat
Saturn getting fucked by a building falling on him is damning shit
Ryokugyu was attacked with something that was his elemental weakness (because if Dragon fire is not the elemental weakness of the wood/nature logia, I don't know what is), got 0 damage and regenerated completely.
Still, some users really tried to shit on him for that. Shit on him for having regenerated with 0 damage against dragon fire being a wood logia lol.
But if Saturn gets sent wrecked by half dead Kuma, loses an arm after a punch and regens, wooo, so hype lol.