あの人 she/he
プライド proud
高すぎて too (この場合)
面倒くさい I couldn't be bothered/a pain in the neck/too much work/difficult to deal with
例文 Even when it becomes painfully obvious that he has made a mistake, he doesn't acknowledge it.
「彼が明らかに自分が間違っていても間違いを認めない。」
参考になれば幸いです。