No. At most, we only helped to overthrow an unpopular government.
Granted, it wasn't hard to do, but the United States was complicit in the overthrow of the government of a soveriegn nation - AND THEY DIDN'T FORGET.
They attacked and held hostages because the Shah was receiving medical care in the US. They wanted him returned to Tehran so they could put him on trial
The embassy was attacked 8 months and a week before the Shah was admitted to the US.
But yes, they wanted the Shah back so they could put him on trial for alleged crimes against his own people. It's called "Justice" and the US intervened and denied them justice.
Why people seem to think it's okay for us to interfere in the internal affairs of other nations is beyond me. Can you imagine if we proposed some law in our country that someone else in another country found unjust and in turn overthrew our government and installed their own man? How well do you think that would go over in this country? Why should we think it's any different in other countries?