This is abstract and not a criterion.
I asked you to define a criterion.
What are you looking for exactly? If the documents are not legitimate, what are you looking of? Israel to put out a statement? "Yeah he was our b!tch the whole time." Or him in Moscow Admitting it? Or the Iranians putting out a statement that they were getting played? lol
Thats not realistic. And thats not how the real world works.
There is plently of smoke if you want to take a look.
From the documents, from the behaviors, from the comments from Observers, both Iraqi PMU people interviewed, Israelis commentators saying they preferred him b/c of their relationship and "known commodity". The shit he was negotiating via the UAE. The denial of several requests that Iran made to put weapons in Syria. reports that this guy ratted on the IRGC generals in the consulate. Iran's non interest in saving him at the end. The beef with the Houthis, where he closed down they embassy in exchange for the Saudi embassy. Turkish intelligence statements from Hakan Fidan that there was a "quid pro quo" understanding between the regime and Israel. The disputes and tensions with the lack of commitment Assad displayed.
What more do you need, where there is smoke, there is fire. You will never get anything more in Foreign relations, b/c its all "inside baseball" as they say.
If you want my take, here is what I think. At the beginning he was desperate, and the only ones willing to die for him, were the Iranians and Hezbollah, and in return he provided them with a minimum in return while not trying to antagonize Israel. So there was never a "full commitment" to fight Israel, as part of "the resistance" that they keep doing PR for. He was trying to survive, he wasn't trying to be a "hero". After the Russians stepped in, he stabilized more, and his dependence of Iran decreased, and he cut their influence accordingly. He thought he had won at that point. Then when the Gaza conflict started, and Hezbollah activated the northern front, Iran and Hezbollah became an outright "liability" in his eyes, b/c the supplies and strategic depth in Syria aggravated the Israelis. This is around the time he moved to cut off the Israelis and normalized with Saudi, he was negotiating the normalization deal with the UAE. The Emiratis(who were the go between him and washington/Israel) were trying to tell him that the Iranians were a liability, and that if he dumped them, the US would give santions relief and the GCC would give investments. And again, at that time he thought he had already won, he didn't need Iran, he had Russia and that was enough.
He didn't want to sell Capatogon all his life, and with the sactions relief he could travel to Europe again, and other benefits. The US promised to give him back the oil fields as well. This guy was gonna take the deal and get rid of Iran to save himself, and he planned to... but then the unexpected Rebel offensive happened and everything collapsed in 11 days.