Nasrallah was the real deterrence card Iran had. With Hezbollah decapitated this card is now lost.
Hamas did lasting damage to the Axis of Resistance by doing the 10/7 attacks with no coordination with the Axis. Not only did they succeed in getting Gaza destroyed and their people subject to genocide, but they unraveled the entire region in the process. HZ destroyed, Assad overthrown, Iran being attacked.
This is all due to one groups bravado and not thinking thru multiple orders of consequences. Add in a complacent Iran who refused to establish deterrence against Israel and you can see now the situation we are in.