The largest Ukrainian diaspora is in Russia - Russia is targeting civilians and trying to kill all Ukrainians
Nice strawman but obviously the accusation is that Putin is choosing to bomb civilian targets, not that he is killing Ukrainians in e.g. Russia.
Despite Martial Law and checkpoints 100.000 Ukrainian refugees still somehow managed to flee to Russian side
The vast majority of those happened before the war from Donbas, i.e. region already controlled by Russia. Again, why would Putin kill civilians in territories he controls. Russian forces are accused of indiscriminate bombing, of which there is plenty of evidence, and they aren't really denying it (the excuse is "human shields").
~ tons of other BS that seems to be of roughly similar post-factual quality ~
So there are basically two lines of argument here: 1) what about others doing x, y, and z (not to be confused with Russian military vehicle markings), and 2) what about all the incorrect things said about this war.
You could start fixing it by getting your own facts right.