The conflict is entirely the creation of the United States. There's two issues at hand. First, the aggressive expansion of the anti-Russian offensive alliance NATO. After USSR fell, Russia was promised NATO wouldn't expand eastwards, which it did immediately twice and again in the 2000s. Russia's (USSR's) bid to join NATO has been rejected three times and NATO acknowledges publicly that Russia is their #1 security concern. This part is about Americans holding on to their unipolar hegemony, regardless of the price to pay. It helps when America rarely has to pay the price for the geopolitics it engages in.
Secondly, America does not like the Nordstream 2 pipeline project and has therefore been slowing and sabotaging it for 20 years. Germany is dependent on Russian liquified natural gas and the pipeline it has been using crosses through Ukraine. Ukraine fairly openly steals LNG and takes a cut for being a middleman. The US wants to cut supply through Ukraine, which it has now managed, and wants to stop the NS2 pipeline in hopes that Germany will buy LNG from the US. To accomplish this, the US spent 5 billion dollars overthrowing Ukraine's democratically elected government [note: any government not in lockstep with US demands is illegitimate by default] and installed aggressive puppet nationalists, because it was obvious they would go overboard with the Russian minority in Ukraine. Of course that happened immediately, going so far as a few Russians burned to death by the Azov battalion in 2015. In 2014, the Ukrainian satrap government passed multiple anti-Russian laws and was pretty open about the fact that they were about to turn Ukrainian Russians into 2nd class citizens. This led to the rebellion in the Donbass and Luhansk. The same year, the Minsk Accords were signed, which Ukraine did not follow. Another round came by in 2015. In the 2nd agreement, a plan was laid out to return the rebel-held territories back to Ukraine (by disarming the rebels) in exchange for significant regional autonomy. Ukraine "signed" the agreement, then spent the next seven years doing nothing to carry it out. Instead, they accelerated their shelling of the rebel regions, which saw the Russian deaths peak in just the past few years, according to the Red Cross.
Recently, the jew Zelensky has come under increasing pressure from the nationalists, including large public rallies, who accuse him of not being confrontational enough with Russia. He has asked first Trump and now Biden to openly support his government, to ease this pressure, but his begging has gone unheeded. Therefore, he has become increasingly antagonistic, including threatening to look into acquiring nukes for Ukraine. He's off his rocker. Finally, after more shelling and no diplomatic resolution in sight, the rebel regions called for Russia to intervene.
So there's your Ukraine conflict.
America, the great satan.