Oh, let’s see, Iranian IED paymasters in Iraq, the Mahdi in Iraq, the (Iranian) Shia revolt in Bahrain, Hezbollah and Hamas in Lebanon and Syria, Yemeni Houthi rebels, the Iranian Republican Guards in Iraq, etc. They’re all funded, trained and equipped by Iran.
Assad got his payback. The Mullahs are owed theirs.
Assad is fine. The winner in fact.
All of the things you listed are bad. They are not however, evidence of THE WORLD’S LEADING STATE SPONSOR OF TERROR. Unless you define doing things you don’t like as “terrorism”.