Especially Feinstein grilling him about privacy, when she votes for and often even sponsors every privacy invading bill and three letter agency out there.
That said, I'm of the opinion Feinstein is largely senile at this point, and wish she'd retire.
I share your opinion that the NSA's surveilance is bad, and I'd assert it's unconstitutional, but the hypocrisy/contradiction you're trying to highlight still isn't necessarily there.
The government can kill me; Facebook cannot. The government can imprison me; Facebook cannot. The government can require I pay taxes; Facebook can not.
It shouldn't be surprising when similar disparities exist on surveillance. The NSA's program has yet to be deemed unconstitutional by the courts, which is what matters.