I don't know what you're going to study my friend but here is my experience ,
If you have someone to help you ( parti ) , so you just need a degree ( sometimes even don't need that , it depends on your parti ) and it doesn't matter where you have taken that no matter if you have a sharif degree or the worst and furthest azad university .
If you don't have the parti then university degree might not be useful but your skill and knowledge plays the main role ( at least in my course , civil engineering )
BTW , University in the other side is important , A good university can make you to advance and become the best in your course and a bad one can destroy you BUT it all depends on you , If you try hard and sacrifice other things for your goal you can make up .
I hope it was useful .
man, a good university is really important. A person cannot grow in a vacuum. the environment is what helps you to grow, or would impede your progress. in anything, there are some exceptions, but even those exception who have not studied in a good university, and made progress, would have much much more progress if they were studying in a proper university.
Your network and links(Parti as you said), are always important, and help you to enter to good universities or companies, ... but you cannot survive in those places, if you have not the required capabilities.