I felt quite bitter about it at the time.

当时我对此感到相当痛苦。

《柯林斯英汉双解大词典》

Instead of feeling bitter about the unfair world, he tried his best to realize his dream.

他没有对世界的不公愤愤不平，而是尽力实现自己的梦想。

youdao

She is very bitter about losing her job.

她丢掉了工作，心里很不服气。

《牛津词典》

While the Whigs made bitter speeches about the failure of the party's legislative program, Tyler worked to improve relations with Britain.

VOA: special.2009.02.05

He feared it would re-open the bitter, national debate about slavery.

VOA: special.2009.04.30

Another bitter point of contention is the former president's decision to have young Ukrainians learn about the so-called Holodomor, a Kremlin-inspired famine more than 75 years ago that was aimed at collectivizing Soviet agriculture.

VOA: standard.2010.03.17

Through all the hardship, Weaver doesn't seem the least bit bitter about his plight.

NPR: New Orleans: A Tale Of 2 Cities Since Katrina

And, of course, many customers are still bitter about the hand large institutions had in breaking the global economy.

FORBES: Credit Union Membership Soars as Customers Spurn Big Banks

On the morning of the match, he is still too bitter about a lifetime of injustice to support the Springboks.

ECONOMIST: Nelson Mandela