Same here, although I confess I wasn’t blown away by this one. I often find that while Ghibli films always crush it on the imagination front, the writing can be hit and miss. I understood the autobiographical origin of the plot, but there were several parts that felt underdeveloped or poorly explained. Overall, was good but definitely not up there with Mononoke or Spirited Away, imo
Ear buds or IEMs typically have a much higher sensitivity than full sized headphones. The higher the output power of your PC’s headphone out, the louder your earbuds will be at any given volume %.
There isn’t anyway around this except to manually change the volume whenever you use your earbuds.