Because Russia is opposed to the west, the west is rich and advanced, and Russia is poor, the Ukrainian people breed pro-rich and anti-poverty sentiments, and the people want to move closer to the west, so they breed anti-Russian sentiments. Because of the behavior of the people, the Ukrainian political elite must stand with the people, which in turn leads to the Ukrainian government's anti-Russia. This is an irrational, objective, superficial and emotional confrontation formed by the Ukrainian people.
This confrontation is not good for Ukraine. It is irresponsible to say that Russia exploited Ukraine in the past and caused poverty in Ukraine. On the contrary, Russia has been helping Ukraine before. In addition, the former pro-Russian president of Ukraine was indeed corrupt, but it was elected by themselves. Corruption does not mean incompetence, nor does it mean that Ukraine's interests must be betrayed.
Another reason why Ukraine opposes Russia is that the United States has promised Ukraine military and economic support, which is one of the reasons why he dares to resist Russia, but he is not too bold. After all, his strength is so strong.
Ukraine's anti-Russian sentiment is a long-standing national sentiment, which is something deep in memory, and Ukraine's geographical location adjacent to Russia gives the United States the conditions to help him.