Rendering text, how hard could it be? As it turns out, incredibly hard! To my knowledge, literally no system renders text “perfectly”. It’s all best-effort, although some efforts are more important than others.
Text rendering is, indeed, in the eye of the beholder, and often preferences revolve around what people are used to more than anything else. Still, displays with higher and higher DPI have taken some of the guesswork out of text rendering, but that doesn’t mean it’s a walk in the park now.