I think is totally unfair to say he hasn't done anything for our football, IMHO if someone want comment about what he has done for our football he has to closely followed the state of our football since WC2006 and specially since 2011 when he took over.
As it was said many times, in 2011 we were probably behind some countries such as North Korea in level of talents, development, structures, proof is NK made it to 2010 and we didn't!! So i think if you analyse our football in last 30 years, twice we were in really decline periods. Once between 90 to 94, another one between 2006 to 2012.
Remember in 2011 we didn't have a SINGLE PLAYER in any half a$$ European league, as it was said before.
What he has achieved was already mentioned, doing this in Iran is like a magic, you can't compare Iran with Japan which 2/3 of squad play in top 3-4 leagues. I think his biggest achievement was, Iranian players for the first time in history were buying a tactic by a coach, instead of alllah-bakhtaki football. Now we can all argue Carlos Queiroz team doesn't play beautiful football, too defensive, result oriented, no second plan when we concede a goal, all of valuable arguments, and no coach is perfect, but for once he gave an identity to our football.
Again playing beautiful football without result is not a good thing either, Japan qualified not ONLY because of beautiful football but because of many factors including luck.
Another issue is, people need to consider, how many coaches in CQ caliber can last 7 years in Iran? People can say, yeah but he is earning good money, do you honestly think someone a full-pocket such as Queiroz at this stage and age of his career, really rely on IFF paycheck?!?
So if you want get rid of someone like him, you better have a better alternatives on the table who are ready to work in Iran and dealing with IFF BSs, and i can bet not many willing to do that. Maybe with the credibility and success of recent years things changed, maybe not, we will see.....