Russia did its utmost to save the INF Treaty. Russia was completely open with its US counterparts and showed what is was doing, but did not receive any response.
Recurring pro-Kremlin narrative that the US is entirely responsible for the demise of the INF Treaty because of its noncompliance in several areas.
The US government issued detailed refutations of Russian accusations of US noncompliance with INF (see previous euvsdisinfo cases).
Moreover, the US government and NATO have raised serious concerns that the Russian 9M729 missile is in breach of INF Treaty obligations.
In a joint statement released after the meeting held at NATO Headquarters in Brussels on Tuesday 4th and Wednesday 5th December 2018, NATO Foreign Ministers stated that they “strongly support the finding ...that Russia is in material breach of its obligations under the INF Treaty.”
In a statement released on the 1st of February 2019, the North Atlantic Council noted that Russia had “taken no demonstrable steps toward returning to full and verifiable compliance” and that “Russia will bear sole responsibility for the end of the Treaty.”