Iran and Syria are fighting a proxy war here.... If they are getting to the Merkavas that is bad news... those are some of the toughtest tanks in the world.
Got news for ya. The M1A2 Abrams & the British Challenger II wouldn't do much better in this type of operation. This is close terrain & urban fighting. Lots of chances for flank shots by advanced AT weapons. Limited approaches giving the enemy a chance to place mines, etc. If the IDF had made a few mass tank rushes in a limited number of axis to the Litani & beyond, they wouldn't be losing the tanks. The IDF infantry could then deal with the cut-off Hez militia at their leisure. Israel has chosen not to do a deep, quick strike.