我的天啊，我是个令人沮丧的人。

Holy smurf, I'm a downer.

youdao

对离异的人来说，圣诞节是个令人沮丧的节日。

For divorced people, Christmas can be a downer.

《柯林斯英汉双解大词典》

像大多数工作的人一样，我发现，时间或缺乏时间，是个永无尽头的令人沮丧的事情和一场永远无法取胜的战斗。

Like most working people, I find time or the lack of it, are never ending frustration and an unwinable battle.

youdao

But,there was a big problem, that for all of his failings,human failings, and there were indeed many, and his intellectual limitations which were daunting, he was a man of faith and loyalty to his principles, for better or for worse,in this context.

但是他的弱点,人性的弱点,是个大问题,而且他的弱点确实很多,还有他的智力界限也令人沮丧,他是个固执于自己原则的人,不管原则是好是坏

耶鲁公开课 - 1871年后的法国课程节选