When it comes to antonyms for the phrase "more hyped-up," there are various words that can be used, such as relaxed, calm, or muted. While "hyped-up" refers to something that is excited, intense or energetic, its antonym should necessarily mean the opposite of it. For instance, if something is relaxed, it indicates that it is calm and laid-back with fewer emotions, whereas a muted event would be one that is quiet and reserved, without much energy or excitement.
In conclusion, when searching for antonyms for "more hyped-up," it is essential to choose words that are opposite to its meaning and evoke a sense of calm or relaxation, rather than high energy or excitement.