expression
for better or worse; in good times and bad
A set phrase meaning 'whether things are good or bad', used to say that something applies regardless of circumstances. Often appears in formal or literary contexts.
良きにつけ悪しきにつけ、家族はいつも支え合うものだ。
For better or worse, family members always support each other.
良きにつけ悪しきにつけ、彼の決断は周囲に影響を与えた。
Whether for good or ill, his decision affected those around him.