The Association Agreement also included sections on political and security cooperation. More importantly, Ukraine was pretty evenly split on Maidan and the signing of the Association Agreement. [0] This split, also seen in elections was largely geographic. [1] Unsurprisingly, toppling the (democratically elected) president tore the country apart, and independent on which government you personally prefer, I think it is really hard to argue that Ukraine wasn't the victim of Big Power politics in this case.

[0] https://archive.kyivpost.com/article/content/ukraine-politic...

[1] https://en.wikipedia.org/wiki/2012_Ukrainian_parliamentary_e...