攻其一点，不计其余攻其一点，不及其余gōng qí yī diǎn , bù jì qí yú

pounce on one point and ignore all others—attack sb for a single fault without considering his other aspects
❍ 他们进行种种挑剔和刁难，大有～的味道。They went in for fault-finding and creating difficulties,leaving the strong impression that they were concentrating attacks on one flaw while ignoring all good qualities.