眼裡容不得沙子

1. • can't bear having grit in one's eye (idiom)
2. • unable to put sth objectionable out of one's mind
3. • not prepared to turn a blind eye

Character by character

• 眼(yǎn)eye
• 裡(lǐ)lining
• 容(róng)surname Rong
• 不(bu)no
• 得(dé)get
• 沙(shā)surname Sha
• 子(zi)noun suffix, as in 椅子 yǐzi "chair"