I agree. Since 1979, education for the general population has been provincial and religious, at best. The vocal unrest seems only to be among those who were already adults under the Shah, and among those university students who have been able educate themselves beyond the religious dogma.
As for the professional classes, they're probably the smallest minority. Without the Russians they would not be able to go nuclear or develop all of their new super weapons (such as they are). Without Russian engineers and techs (hired since the collapse of the Soviet Union), they'd probably be hard pressed to keep the lights on. Oil money can buy a lot.
Last count there were about 40,000 Russian consultants operating inside Iran in almost every facet of technical life, construction and industry. Plus consultive roles.
Their salary/earnings every month are quite significant an income flowing into Russia as much of it appears to do.