I really liked this ending actually, since in the end, all the blood, the tears, the deaths were for a world like this, one where everyone can live happily in peace and now we see the ones who fought and died for all of this being able to live freely as well. I think it's sweet and really helps to soothe all the sadness from all the deaths before. (and let's be honest, Gotouge probably saw the trash heap fire endings for Naruto and Bleach and was like 'nah, I'll reincarnate before I give Tanjirou a dad cut')
anyways, is it me or is it pretty cruel for Tanjirou to tell Yushirou not to die? and now he has to live in hiding for eternity only being able to draw Tamayo as an outlet for his loneliness now that everyone who knows about him is dead and everyone else he meets will also move on without him as he's stuck in a neverending life. also sad that Inosuke's not with everyone when he reincarnates