You use blatantly to indicate that something bad is done in an open or very obvious way.
a blatantly sexist question.
一个毫不掩饰的性别歧视问题。
Blatantly is used to add emphasis when you are describing states or situations that you think are bad.
It became blatantly obvious to me that the band wasn't going to last.
我看得再清楚不过,这个乐队存在不了多久。
For years, blatantly false assertions have gone unchallenged.
很多年来,极其错误的断言从未曾受到质疑。