He's not an Iranian telling it like it is. He's an American with an Iranian family who, rightfully and for personal reasons, detests the regime. He most likely has never been there for more than a span of a few months, if that. He has no vested interest in the success and survival of the Iranian people and no real attachment to Iran.
Yes. It's true that the Iranian government is corrupt, brutal and oppressive. This isn't information that should be hidden from anyone and in truth it really isn't. But why does this person feel the need to make it a focus of discussion, right now, as history is being written on paper instead of corpses?
The answer is that he, like many Iranian ex-pats (especially the social elite who were affiliated with and benefited from the similarly corrupt and brutal monarchy), has so much hatred for the current regime that it overshadows his concern and compassion for other Iranians or Iran as a whole. These people would watch the country burn, just to stick it to the Mullahs.
I don't like the regime. I lived under their oppressive rule for 10 years, the formative years of my life. I was harassed and threatened by bearded hicks in police uniforms for flirting with girls. Some of my friends were abducted and beaten by the secret police. One morning, I woke up to tear gas blotting out the sun and the sound of gun shots and screams, the chorus of a riot. I don't see the country through rose tinted glasses. I have no love for the Mullahs.
But the truth is, for the time being, there is no other option. To destabilize the power structure in the present geopolitical climate would be a death sentence to the nation and all its' people. Without the Ayatollah, The IRGC would splinter into a group that would make ISIS look like bible study. Mossad and the CIA would scramble to create conflict and attempt to stage a takeover. ISIS would flood the borders. Al Qaeda would move in. The country would be decimated.
These are the repercussions that people like the one you responded to don't care about or consider. To them it's about revenge. The fate of the Iranian people is no more a concern to them than the bodies piling up in Afghanistan, some distant group of pitiful brown people to perhaps sympathetically shake one's head at while reading the headlines, before finishing off his Latte and running to Lecture or work.
TL;DR: He's not an Iranian.