蚊の食うほどにも思わぬ
Meanings
1
not care at all; not be bothered in the slightest
Idiomatic expression meaning to be completely untroubled or unaffected by something, as if it were as trivial as a mosquito bite. Often used in negative constructions.
He seemed completely unfazed by the criticism.
That person doesn't seem to care about failure at all.