At the current stage it unfortunately looks like nobody is capable of “facing” the Iranian regime and they are taking as much advantage out of it as they can.
Today they are boldly boosting that they can do whatever they want (nuclear developments) and nobody is really reacting.
With their armed forces close to the Stone Age, and a “regime” that is slowly dying (still got decades to go), what they really need, is a big punch in the nose!!
However, unfortunately previous experiences in neighboring countries have made it impossible to get any international action against Iran going.
Finally the BIG winner of the Iraq “war” is probably Iran. They are now “protected” by international “non interest in action” for quite a while.