The kind of vibe you're describing is similar to how I think the Ari Aster horror movies work, you get so emotionally drained and tired from the constant misery and stress the characters are dealing with and that, I think, makes it harder to put up walls and make light of the scary parts.

Skinsmarink seems like it'd do that really well but I read the description and while I might have watched it five years ago ever since I became a parent I just can't handle kids being subjected to that level of trauma. I cried during Onward lol