I think Russia and China both have adopted the best respective strategies suitable for their own countries and circumstances. Russia has to stand firm and act strong in the face of West aggression. They had been naive since the fall of the Soviet Union (really since the Gorbachev era). Even Putin was genuinely hoping to cooperate with the West at the beginning. The West has been relentless and unreliable to Russia. Russia has learned their lesson. They have to stop the western aggression and erosion now; there is future for a "hide and bide" type of strategy.
China is different. It started poor and low and has benefited from a low-profile strategy. It's been growing, growing and growing. Time is on its side because much of its potential is still untapped. But China has gotten to the point where it can no longer stay low and the US (and to a lesser extent other western countries) is getting fearful. So the US is doing all it can to slow down if not stop China's growth. China is not yet strong enough to engage the US in a open, all-front conflict, but it has to push back strongly against US's deliberate attack against China's core and sovereign interest (Hong Kong, Xinjiang, Tibet and Taiwan). Trade war or even tech war is OK and can be manageable in comparison.
By the way, the quality of the US leadership since the end of Cold War has been mediocre, to put it very mildly.
Russia, despite what we say regarding its weak economy, wields huge soft and military power. Whether or not Russia was able to influence the US elections, BLM protests, its already a victory in that it is believed Russia can do such things. It was able to pit BLM, democrats vs republicans, which are skills which China must learn. Russia realized that if it couldn't get Americans to kill themselves they would kill Russians instead. It was the right thing for them to make Americans kill each other. China must also realize that Americans MUST kill, it is in their nature after 250 years of history so China must respond accordingly. Frankly it would be better if China expressed more outrage at the massacres of asians, africans, and latinos that now occurs on a daily basis.