Because it deepens the rift. Donald Trump as president also helps Putin a lot, as the russian president have said before, since Trump also wants to shake things up. As could be seen by his tariff policies.

Russia has been cut out from the West, it couldn’t even participate in the Olympics. So it got closer to China. Its economy is resilient despite the war. Russia has also been the leading country in the BRICS in regard to finding an alternative to the dollar together with Brazil. And it is working to ditch SWIFT (the banking system). So I’d say Russia is pretty interested into getting away from the West, at least economically and politically.

If I had to guess (my knowledge is a couple of geopolitics books), I’d say Russia wants to create a rift between East and West that is beneficial to China as well. China helped Russia build a quantum computer recently and there are more clues that they’re getting even closer together. I think Russia wants to shake the current world order.