>>88009878vshojo is a big ass upgrade from the shitshow that is nijiEN, but mike came from not just hololive but holoJP. not only is it the ultra top dog whose numbers and impact dwarf vshojo's as a whole, but she went from an environment where the management all speaks her language to one where presumably only a handful do and she otherwise has to try to handle working for a Western company.
kson was up to the task because she speaks English just fine - mike, or rather nazuna back then, absolutely does not. most Japanese are taught at least some English in school but they usually are not tasked to ever need to use it in day to day life so it deteriorates fast beyond the ability to read/pronounce the words (which actually can be a bit useful for them since English lettering is common all over including in Japan).
even so, she could have tried to make it work but as we all can well see she always has these unrealistic expectations of herself and is a black hole of constant coping and seething after getting herself kicked out of Holo.