The unnatural and erroneous prioritizing of Ukrainian over Russian (the mother tongue for 83% of the citizens) led to a civil war that tore Ukraine  apart and caused its rapid decline and downfall into abyss with millions of its citizens on the run, a demographic collapse, its economy in tatters and the government disorientated and panic-stricken.
Ignorant language planning
Robert Lane Greene's book “You are what you speak” may have offered one of the most devastating pieces of criticism at such an ignorant language planning sponsored by the government. "Create a state that everyone hates and then yoke it to an official language, and both the language and the state may fail. Create a society people want to join, such as the international community of English speakers or a modern, tolerant South Africa, and it is never necessary to force a language on anyone.” [Greene, 2011: 162 - 163]