Israel’s Qatar strike was an absolute fail, for multiple reasons:
Killed any chance of expanding Abraham accords for a while
Made Israel and America look like bad allies who will backstab for their own gain
Hurt relations with basically everyone, including America
And didn’t even kill the Hamas leadership they were trying to hit!
Even if it did kill them, would it even help the situation in Gaza? (See my explanation below)
Usually Israel actually succeeds with their plans. It seems they have good intel and ability to strike most of the time, regardless of their intentions. But the core premise of this plan was to decapitate the leadership of Hamas - which would mean all the cells on the ground now have no one to tell them what to do with the hostages. Israel would have no way to negotiate with the leadership to release any of the hostages, which if you can’t tell, prolongs the war.
And it hurts their credibility with Hamas: how do they know they can negotiate without getting bombed? I think this was just Netanyahu trying to get some credibility with the people, because it doesn’t help anything on the field.