While I understand that the true purpose of sanctions is to weaken a country's military, sometimes I do wonder if it is a war crime as it also ends up effectively "punishing the people".
I don't see the people in Russia overthrowing their government either. It seems more likely that internal public pressure would embolden a political change. It only takes the second layer collectively deciding it's politically expedient.
That doesn't necessarily mean the war stops though. Russia has been reshaping itself into a war economy to keep going, that might be hard to unwind.
The reason it succeeded in Ukraine and Bangladesh was because of a clear polity divide amongst the population, and huge local support from one of the political sides (including, very importantly, the army), which meant the double goal of (1) getting rid of an "unfriendly" government and (2) installing a "friendly" government could easily succeed. In Sri Lanka and Nepal, it has meant a regime change, but it isn't clear if whoever fomented the "revolution" - the west or the Chinese - have managed to get the desired "friendly" government. However, in all 4 cases, the so-called "revolution" has replaced experienced democratically elected leaders with inexperienced politicians at the helm (which is the second-best option you could hope for, if you can't install a puppet, as inexperienced leaders are more susceptible to political manipulations).
In Iran, what went wrong with this "revolution" is that, first, there is no real local support for pro-west or pro-Israel polity. All those who remember the Shah's regime (when Iran was an ally of the west) and had fond perceptions of the west are now either old or dead. Most of Shah's political supporters were either purged or left with the Shah to the US (or elsewhere). The later, and current, generation has only grown up experiencing American and Israeli hostilities. Irrational western Islamophobia and Israeli-right's hostility to Islam also doesn't help. Along with an understanding of imperialistic history, they despise repeated western attempts of interference in their politics and thus, overall, have have no goodwill to either regimes. Thus, those hoping for a regime change and the installation of the Shah were always delusional that any hostility for the Ayatollah could be translated to support for the west and the Shah. (Moreover, the current "Shah" - the son of deposed Shah - who the west hope to install in power, chooses to stay in US or Europe and thus has no support or understanding of the domestic politics of Iran, and he largely perceived as a puppet of America and Israel amongst the local Iranians).
Second, Trump and Netanyahu's regime underestimated the Ayatollah regime. They figured that just as in Ukraine, Bangladesh, Nepal and Sri Lanka, the government would somehow cave-in under the violent protests rather than opt to suppress the political violence because of the high death toll. Perhaps they might have partially caved-in, if not, for Trump's and Netanyahu's very public "appeal" to the Iranians to "seize the moment" and overthrow the government. This immediately made the Ayatollah regime resolute that the revolution was foreign-instigated, and gave it a public excuse to unleash State violence as an emergency measure (that any State would normally do when faced with a foreign backed insurgency) against protestors. And as Trump's regime claims, the "revolution really failed because the guns that were supposed to be distributed amongst disgruntled Iranians never reached them. Moreover, Iran, that has been surrounded by west and western allies, that has repeatedly sought to undermine it, has been studying western imperialism and destabilisation strategies for decades now. After seeing what happened in Ukraine, Bangladesh, Nepal and Sri Lanka (who were genuinely unprepared for an unexpected violent political protests, in their political planning), it probably already had a contingency in place for a similar situation that the west never anticipated.
Also, if the Americans and Israelis had been more patient, and not immediately attacked Iran, the high death toll (around 3000 or so) of the Iranian protestors could have been used against the Ayotallah regime. The deaths (and arrests) had resulted in a rise of anger and hostility against the regime, which could have been tapped in by the local opposition (who have been demanding further reforms in Iran's pseudo-democracy). All that political potential has been forever lost now because of the rash decision to kill the Ayatollah (who is now considered a martyr, and even more revered) and invade Iran.
Everything that could go wrong, has gone wrong, with the current political strategy against Iran ...
Arguably the Soviet Union. There's also a fairly strong argument, I think, that apartheid South Africa jumped before it was pushed, here.
There was also an attempt in Belarus, but Belarus is imperfectly sanctioned; it has Russia propping it up. There is no super-Russia propping Russia up, however (China's support is fairly conditional and Putin would be foolish to depend on it.)
