~ひいては => by extension N1
Add
ひとつ => A little N3
Repetition, habit
…ひとつも…ない => cannot possibly be ~ N2
Evaluate
もうひとつ…ない => (not) anymore N2
Description
... ひとつ…ない => nothing/not at all… N2
Emphasize the negative meaning
ぜひ => by all means; certainly; definitely ~ N5
ひじょうに => very; extremely; exceedingly N3
Description
なにひとつ~ない => nothing/not at all… N3
Invariant
ひとつ…できない => cannot do the bigger things N3
Ability
~ ひではない => being no match for; cannot be compared with N1
Compare
…ときたひには => when it comes to N2
Story topic
ひとつまちがえば => Just (negligence) N3
Ability