As I said in another thread, a lot of the problems stem from the usual playstyle for IB - that his whole kit naturally encourages a defensive and passive (even if using active crowd control) style. While a more active style can (and in name of effectiveness, should) be learned, it’s not intuitive, as nearly all of IB’s abilities are on the defensive side. He is hugely resilient, and that allows a lot of leeway in what you do.
So until we get some more encouragement for a more active Ironbreaker, try breaking out of the defensive playstyle, and try him as a berserker instead. You can take the hits anyway.