Thermobarics are not banned.
Certain sorts of cluster bombs are banned not all of them, and Russia never agreed or signed up to the ban so are free to use them.
And it is a war, people die, civilians die, get over it.
God knows how all you poor souls would have coped during WW2 when allied forces firebombed and flattened 15 german cities, litterally burning thousands of civilians alive
Getting on for half a million German civilians were killed during the war, you lot would have had Churchill and Roosevelt up as war criminals.
Really just get a grip on reality.