Do not mistake leadership and regular people. Afghanistan president Ghani handed over sovereignty to US too but Afghans disagreed. I am confident that there is significant minority in Kuwait wishing for Iran victory. As a datapoint, there were videos from Bahrain with people cheering for Iranian rockets hitting American bases.

Bahrain has a significant Shia population that feels oppressed and identifies with Iran.

That's not similar to Kuwait, a country that has a recent history of being taken over by its largest neighbor and saved by the US