I'm really not a bit surprised.

我确实毫不吃惊。

《柯林斯英汉双解大词典》

She was not a bit surprised.

她一点儿也不吃惊。

youdao

Frankly, even I was a bit surprised by this one.

坦率地说，即使是我也有一点儿惊讶。

youdao

For starters, I was a bit surprised by the large number of credit cards per cardholder.

FORBES: Do People Still Love Credit Cards?

But the market place was a bit surprised by the meeting minutes that hinted such is indeed the case.

FORBES: P.M. Kitco Metals Roundup: Gold Higher in Late Trading, at 4-Mo. High, on Bullish FOMC Minutes

Australia captain Ricky Ponting , Vaughan's adversary in the 2005 series, said he was "a bit surprised" by his retirement.

BBC: Ashes hero Vaughan calls it quits