Rhythm introduction seems like overmapped; modder told the mapper that the intro is way harder than the latter part because of confusing spacing usage and other stuff:
https://osu.ppy.sh/beatmapsets/878508/discussion/-/generalAll#/748123 leads to https://osu.ppy.sh/beatmapsets/878508/discussion/1837350/timeline#/736669
https://osu.ppy.sh/beatmapsets/878508/discussion/-/generalAll#/748123 leads to https://osu.ppy.sh/beatmapsets/878508/discussion/1837350/timeline#/736669