Yes Russia invaded, and that was very, very wrong. Putin turned a small civil war into a serious international conflict.
Zelenskyy's response is a failure and unjustifiable. His main duty as a leader is to save lives, and as a smaller country threatened by a much larger one, this involves negotiation - not sacrificing hundreds of thousands of people out of ego, sticking to the same failed tactics.
Ukraine has a large ethnic Russian minority; the country has been involved in a low level civil war since 2014, with ethnic Russians rightly or wrongly perceiving themselves as persecuted. Some regions in which they are the majority wanted to separate.
Zelenskyy appealed to both Ukrainian and Russian speaking sides in his election campaign and promised to unite them and bring peace. He has beyond failed to do this. Clinging on to separatist regions by force is not what he promised voters. He has polarised the country even further by accusing anyone who remotely disagrees with his tactics as being pro-Russian. Now Ukrainians have no polticial way to get rid of this literal comedian who is leading them to their deaths.
Also foreign powers were pumping Ukraine full of arms and aid preparing for a Russian invasion, which became a self-fulfilling prophecy because they gave Russia a reason to feel threatened. Also after the war started, Boris Johnson immediately made it clear that "Putin must fail", which was the complete opposite of negotiating and left Putin with only two options: win or fail, so no incentive to stop. The sanctions made this even worse; there should have been offers for ways Putin could get the sanctions lifted. There was just no carrot to get him to stop the war, and every reason to continue.
Russia and Putin have their own colossal responsibilities and roles in this, but that's not in our control. As for the West, Europe and Ukraine: they need to cut their losses, and focus on saving lives and preventing this war from ever-escalating.
If they don't, it's guaranteed WW3. Ukraine CANNOT win this because they are much smaller and have less resources. It's that simple. They need outside help, which can only end in major international conflict.
Remember, this drawn out war is using up and weakening Western resources should something even bigger occur. It is in everyone's benefit to stop.
We need to focus on giving Putin incentives to stop. This will mean Zelenskyy will need to give up some land. That's the consequences of his failure. He is NOT victim, he is orchestrating mass murderer, just like Putin.
At some point we need to put human lives first instead of worrying about the glory of Ukraine keeping all of its rather unwilling territories.