Russia employs modern ballistic and drone warfare to fight Ukraine. USA can't have its way with Strait of Hormuz and Iran because it can't fight against ballistic missiles and drones effectively. And Poland position is... USA will fight against Russia and their drones and their ballistic missiles while at the same time... USA hasn't been able to do it with much smaller and weaker Iran for 7 months now. Iran got control of the Strait of Hormuz and Iran still has the control of the Strait of Hormuz. For 7 months now USA can't do anything about it. How come you are so sure if they can't protect their allies in the Middle East to export oil through the Strait of Hormuz they will be so successful protecting say... Suwalki "Strait" from much stronger and nuclear strike ready opponent? Reality check? I think we will get one.
In all fairness, the US by itself is fighting someone else's war on the other side of the world, in a region that's generally not super friendly to them.
Russia is fighting its own battle at its own border against an enemy which receives some support from NATO countries.
US leadership fights to not lose face, Russian leadership loses a lot more than face if they back off.
The US can absolutely conquer or decimate Iran and has explicitly avoided targeting energy infrastructure or doing so (understanding that doing so gets us another Iraq or Afgahnistan) but it's not as if the US can't "take on" Iran it's that the US expected regime change in Iran rather than a dragged out war.
Iran doesn't need to conquer or hold Hormuz they just need it in missile/drone range - it's not symmetric.
As for the impact on the global economy - the entire world is letting Iran hold its gas/oil hostage because of something the US did. I'm not sure why those countries don't pressure Iran more they're not at war with them they shouldn't be embargo'd.
It absolutely can conquer Iran lol it's a much stronger much better funded army - the issue is _holding_ Iran and what the point actually is. Even in conflicts like Vietnam when the other side had a superpower backing them (or Afghanistan when the Soviets attacked it) the issue isn't grabbing the territory it's the fact holding territory doesn't actually accomplish much and the strategic goal (not having a nuclear theocracy there) isn't met long term.
Those people also hate the IRGC; the recent popular uprising was only suppressed by murdering ten thousand people. The regime is not as stable as you think.
Just war [0] proponents will argue both. For instance, targeting civilians/civilian infrastructure is gravely immoral (the decimation part), but also any armed conflict is unlikely to be successful and thus would be immoral on the grounds that there is no reasonable chance of success (the conquer part). But frankly, in this case, we don't even meet most jus ad bellum criteria, let along jus in bello.
Not really raised to hate the US, but they do learn in school that the sarin Saddam Hussein used on their parents and grandparents were from US stocks. Which is factually true, even if used as propaganda.