Geography prevents most people from exerting the form of control Iran has. It would be much more difficult for, say, Canada to control it. The Iranian coastline is pretty favorable.
Also, most governments are more susceptible to being bombed than Iran. They’ve been preparing for it for decades. If nearly any country (except for maybe a couple of Irans neighbors) tried, they’d be easily routed.
Iran is getting a lot of help from Oman, so perhaps thats a place to start.
What do you mean by "so that's a place to start"?
Oman is known as the "Switzerland of the Mideast" and has served as a trusted mediator in the region for a long time. Ostensibly, the Omanis have advised the US about the perils of attacking Iran, which is why no president before the current one was stupid enough to do it.
The US is the second largest foreign investor in Oman, and Oman is one of just 14 countries the US has a Free Trade Agreement with. US citizens can own a business in Oman 100% without a local partner.
Oman is not helping them, they are merely being granted tolls by Iran because the strait is shared. Iran has launched several attacks on Oman.