Russia currently has the strongest and brightest soldiers in the world. Don't forget it's Russia vs the most advanced Nations on Earth. Mecenaries fighting Russia are made of soldiers from advanced countries with advanced weapons they are familiar with from their governments.  Russians continue to move forward nevertheless. Whatever set back you think they have is most likely deliberate. For example in kursk... that was done deliberately to prevent any negotiation with the cunning entity (or the globalists) who is the real opponent in the battle. They were trying to trick Russia into negotiating a ceasefire. And that usually happens when Russia is about to win. A ceasefire would give them the opportunity to regroup in the future. But what is needed is their complete defeat and putting them in hopeless situations. Opponent soldiers were allowed in kursk to prevent the negotiation. That is one of the best ways to prevent Russia from going on with the negotiation.

In regards to fighting with evil soldiers, well, intelligent soldiers fight with care and in humane way until you give them reason to be brutal. Besides, Russia is in control of the situation. There is no need to be angry or brutal.