Given the context of the sanctions imposed by the Obama administration in 2014, it's unlikely that Putin and the Russians expected international legitimacy from the West.
The sanctions, which targeted Russian individuals, entities, and sectors, were a clear indication of the West's disapproval of Russia's actions in Ukraine. It's likely that Putin and the Russian government were aware of the sanctions and their implications, and therefore did not expect to gain international legitimacy from the Minsk Agreement.
In fact, the sanctions may have even contributed to Russia's skepticism about the West's intentions and its willingness to adhere to the terms of the agreement. Putin may have seen the agreement as a way to temporarily alleviate some of the pressure from the sanctions, or to create a sense of uncertainty and division among the Western powers.
You're also correct that the Trump administration imposed additional sanctions on Russia, starting in 2017, which further escalated the tensions between Russia and the West.
Overall, it's clear that Putin and the Russians were aware of the sanctions and their implications, and it's unlikely that they expected international legitimacy from the West.
Do you think the sanctions have been effective in changing Russia's behavior, or have they had unintended consequences?
It is likely that if the West has held to the terms of the Minsk agreement, Putin might not have invaded Ukraine in 2022. This is not a popular narrative with the Western media but the leaders basically admitted they were trying to get one over on Putin.
This is the situation with Donbas:
It has to be one of the reasons Putin invaded in 2022.
This is also noteworthy to the discussion about Donbas.
History shows two Russian leaders came from Donbas. If that was the case, it is impossible for the Ukrainians to legitimately deny the history of the region.
To do that, the West would need to acknowledge the historical significance, something it appears unwilling to do. Ukraine is nothing more than a proxy for the Western Neocons who hate Russia and Russians. People like Lindsey Graham, of the US Senate, have wanted to take over Russia for its minerals.
It seems this is the goal of NATO.