People say you won't get a good evaluation at work if you take too many of your personal holidays.
この場合、次のような言い方ができますよ。
ーPeople say you won't get a good evaluation at work if you take too many of your personal holidays.
「休暇をたくさん取ると、職場で良い評価をもらえないらしい」
to get a good evaluation で「良い評価を得る」
to take too many of one's personal holidays で「休暇をたくさん取る」
ご参考まで!