The only reasoning Mossad is effective and all are mainly due to having the backing of the US providing as a cover.It seems IDF ground force is as incompetent as Mossad is brilliantly effective, what a strange combo. As underhanded Mossad's MO is they are really the MVP on Israel side.
However assassinating their enemies leader does not seems to translate to battlefield advantages, Hezbollah still maintain unit cohesion despite the lost of their leader and they're mauling the Israelli hard. As far as defensive operation is concerned each units can more or less operate independent from central command.
Most of its operations were just downright illegal and irrational for a sensible state to partake. It is quite a paper tiger without any of its "glamorous" spec ops and not to mention it cost a huge amount of resources in conducting such operations and make Israel open to external attacks (e.g. 1973 Yom Kippur War).
Considering the Russians experiencing some trouble in dealing with Ukrainian Su-24 lobbing cruise missile attacks, what's stopping Iran doing the same anyway? They have around 23 of it.What fighter jet? Their museum pieces?
Truthfully, Iran could have gotten their Su-35s long time ago if they didn't demand for Transfer of Technology, which is quite a tall order for the Russians.