"His personality is a bit of a problem but he is good at dealing with customers."
- "His personality is a bit of a problem but he is good at dealing with customers."
"His personality is a bit of a problem but" 「性格には問題あるが」
”dealing with customers" 「お客様対応」
"good at~" 「〜が上手」
男の人の場合 "he" を使い、女の人の場合 "she" を使います。