В постылом все немило

If you do not like a person, whatever he does seems wrong to you. See У свекрови всегда невестка виновата (У)

Cf: Faults are thick when love is thin (Am.). Faults are thick where love is thin (Br.). When love cools all faults are seen (Br.). Where love fails, we espy all faults (Br.). Where there is no love, all are faults (Br.). Where there is no love, all faults are seen (Am.)