In all cases these are dubious Russian claims. I don’t see any Ukrainian media making the claims you say about the second attack, more that it was a barracks in a former hospital building.
You should translate the required topic to Ukrainian or Russian language and check the web. You will find there are direct statements of Ukrainian media what they did hit the VIP hospital by HIMARS. And you will see happy comments and smiles. As you can see, they doesn't pass it to international media, because it war crime indeed. And western media also avoid to mention such things.
As result - quite "dubious claims" from one side and "terrible act of genocide of civilians" on other one for same thing.
If you check all the news from different sides, you will find immediately - you get very biased filtered out facts all the time. It is only one situation, but such happen all the time. About reasons of war (although no war has been declared by either side), about genocide, about atrocities, about losses - you get lies all the time.
I think you know it, but prefer to maintain the established picture of the world that most of your fellow citizens share, which is drummed into your government's head. Otherwise you will be a weirdo, somebody not like everyone else. Also it is much easier. And if the truth differs from that picture, so much the worse for it. Whoever is stronger is right. We decide where the truth is, right?
But there are another mighty countries at rise, while your country gives up its position. Especially in terms of standards of morality and ideals. And your attitude "no laws and rules for somebody we declared as bad guy" is clear example of it.
And the saddest part is that you really don't give a shit about Ukrainians. You root for them like a horse you bet on. You don't care if it dies after end of the race. You'll forget about it like you forget about Afghanistan after leave. Like all the countries that were left to bleeding after their "democratisation".
Ok, you keep cheering each other on, and I will support my country. People like you will definitely not spare it and will destroy the future for my children, so I will have to stand up to the end, whoever started this conflict, whoever is in charge. Probably, you will do the same in such situation.