Ukraine's parliament overwhelmingly supported the EU-UA agreement. It had the support of the populace. Yanukovych was going to be replaced at the next election because of it, and his violent suppression of the protests only sped that up. There was no need for western involvement to make that happen, and your belief that there was is an evidence-free conspiracy theory.
https://euvsdisinfo.eu/report/us-launched-euromaidan-to-weak...