No, I think it is your account that is attempting to over-simplify world politics into a Tolkien-esque story of good vs. evil, with Yahya Sinwar as a Bond-like villain and Iran as the secretive puppet master, pulling the strings, pulling the strings from the shadows. The problem is that this simplistic story doesn't seem to have much to do with the facts on the ground, as we can observe them, and not imagine them.
For example, I cannot find any information about Ismail Haniyeh having left for Qater with his merry band of revelers because of Sinwar. The scant information we have about the support of Hamas among Palestinians suggests that Hamas is popular enough among Palestinians in Gaza, and certainly in the West Bank, that if there was another election they would easily win it [1].
The same goes for the Israeli government. Certainly everyone agrees that Bibi is doing everything he can to prolong the war to save his ass, but at the same time his government coalition enjoys the support of a majority of the Israeli voters, whom, after all, it represents [2] [3]. And a majority of Israeli civilians support the "war" [4]. Scare quotes because that's not a war but an unhindered massacre of a defenseless civilian population.
>> Sinwar expected Iran to go all-in on a final war that would wipe Israel off the map; instead, Hezbollah stayed home, and the whole plan fizzled.
There is absolutely no reason to assume any of that is true. We do not know what were the strategic goals that Hamas had in invading Israel. They have given some reasons but they're not exactly a trustworthy source so the best thing to do is to avoid launching into wild speculation.
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[1] Palestinian poll shows a rise in Hamas support and close to 90% wanting US-backed Abbas to resign
Overall, 88% want Abbas to resign, up by 10 percentage points from three months ago. In the West Bank, 92% called for the resignation of the octogenarian who has presided over an administration widely seen as corrupt, autocratic and ineffective.
At the same time, 44% in the West Bank said they supported Hamas, up from just 12% in September. In Gaza, the militants enjoyed 42% support, up slightly from 38% three months ago.
https://apnews.com/article/israel-hamas-palestinians-opinion...
[2] The Israeli public has embraced the Smotrich doctrine
The terrifying Smotrichization of the Israeli public is embodied in the total willingness to sacrifice the lives of every last Palestinian in Gaza for the ultimate victory that the far-right minister promised in his plan. It is the terrifying indifference to the astronomical number of dead children, and the complete internalization of the idea that any thought of struggle and freedom on the other side of the fence must be extinguished, no matter the human cost.
https://www.972mag.com/smotrich-decisive-plan-israeli-public...
[3] How Israeli youth helped usher in the farthest right-wing government ever
Recent polling backs that surprising observation: A joint poll published by the Israel Democracy Institute last month found that 73 percent of Jewish Israelis between ages 18 and 24 identify as right-wing, compared with only 46 percent of Jewish Israelis over 65. Young Jewish Israelis are showing up to rallies and polling stations for the extremist politicians whose November electoral victory ushered in Israel’s farthest right-wing government ever.
https://www.vox.com/world-politics/2023/2/23/23609584/israel...
[4] As trauma of October 7 massacres endures, Israeli support for Gaza war remains high
https://www.timesofisrael.com/as-trauma-of-october-7-massacr...