If you took the time to read the US Department of State’s annual report, Country Reports on Terrorism, you would find out that the major perpetrators of terrorism are Sunni groups, not Iran nor groups allegedly sponsored by Iran. The funding for Sunni groups comes mostly from Gulf countries that are considered allied to the US: Qatar, UAE, Saudi Arabia.
The most prolific terrorist groups in the last decade has been ISIS and their satellites, followed most of the time by groups such as The Taliban, Al-Shabaab, Maoist/Communist Party of India, Bloch Liberation Army, Haftar, Hay’at Tahrir al-Sham and other group with ZERO relationship with Iran.
It is only more recently, than Hezbollah, Ansar Allah and Hamas has been show with more proeminence in US Department of State compilation. But this is a bit complicate, because at least for Hezbollah and Ansar Allah, it is clear that they engage more with Israeli military targets, congruent with you would expect from nationalist liberation movements.
Other than the October 7th, Hamas also had stopped attacks against civillians since they took power in Gaza around 2005, and even in the October 7th we need to separate fact from israeli propaganda, as it could be argued that it was mostly an operation to kidnap Israeli soldiers to exchange with palestine prisoners in negotiations, and that a lot of the civilian deaths were caused by the reaction of the IDF itself, applying the hanibal doctrine, something you can easily do by reading Israeli newspaper such as the Haaretz. Remove the comically fake atrocity propaganda lies about supposed mass rapes and babies in ovens, and it is not that different from IRAs action against british forces in the 70s.
And no America is not bad. America did a lot of good to the world also besides the bad things. All the world used to admire and try to emulate america, I don't know a single person who have lived in America who doesn't have good things to say about the American people But... America has a big problem with an absolutely out-of-control military-inteligence-corporate subterranean parallel state, with an absolutely suicidal best-ally and a thoroughly incompetent president and war secretary.