too much honestyでいいでしょう。見方を変えればbrutally honestとなるかもしれません。イデォオムとしての言い方は honest to a fault です。0;09 I'm honest to a fault. 私はとても正直。
The Bold and The Beautiful - Unvarnished Truth
https://www.youtube.com/watch?v=PkwLw8XvKcw 0;46 honest to a fault
https://www.youtube.com/watch?v=ZfEcsGMyL2Q 1:00 members are brutally honest about their struggles from being mocked on the street to the peril of something called 'chubra'
参考リンク
http://www.youtube.com/watch?v=jCQjvprOnoA 0;22 you're painfully honest. そして君は残酷なくらい正直だ。
練習問題解答
a-9763 generous to a fault