It takes a really good friend to not only accept and forgive the hurt caused, but to help fix the problem, too. Usually an apology from the problem-causer must come first.
I think what we're seeing is that the USA has un-good-friended so many countries that it has no good friends left with the military capabilities to help. It has allies maybe, but nobody who would do such a favor after being victimized by the asker and the problems they caused, without even so much as an apology.
It certainly doesn't help that the USA is asking for help, but probably wants to boss around anybody who volunteers, and it is doing none of the work itself. Sounds like a toxic team.
> Iran is everyones problem
Iran is not everyone's problem. The effects of israel and the USA's war of choice on Iran are everyone's problem. What we're seeing now is not a result of anything Iran did, but rather something the USA and israel did. The worse the effects get, the more blame will be heaped upon the USA and israel. To that end, most countries are likely of the attitude that they have already incurred enough costs from the USA and israel's war, and that the USA and israel had better fix the problem they caused ASAP.
If, at that point, the USA perpetrates any sort of further economic attacks on allies, then of course they will respond appropriately.