These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV on exactly the grade of Nightmare Retardant. They are described as six feet tall and eyeless, shambling about and squawking loudly, a far cry from this◊. A bit unsettling depending on the reader.
So, this◊ is an albino penguin. If it was 6 feet tall and eyeless... yup. Still cute.
Unless you interpret them as looking like this. Ew.
Values Dissonance: The reader is meant to sympathize with the "upper-class" Elder Things over the "lower-class" Shoggoths, which were manufactured en masse by the Elder Things to act as their servitors. Admittedly, it's easy to do when one is rational and ill-fated and the other is a formless, possibly non-sentient mass of black goo trying to rip your head off (literally), but still. It's like a biological ancestor to the Robot War.