Coming from a guy that uses all three classes in crucible regularly, golden gun is by far the most easily shut down super. Second to that is FoH. I get shut down at least once a match with a max armor build and the perk that gives extra health while using it. A lot of times it just has to do with the nature of the super. If you have to get close to a mess of enemies to use it, chances are they will all be firing at you.