I would say Putin reaction to the fall of Afghanistan must be bittersweet.
Sweet, because I am sure he enjoys the humiliations of the USA. He is not our friend and he likes to undermine the US. He must be enjoying what he sees now from that point of view.
But, I am also sure, he does not want Taliban to take over the Afghanistan. The radical Islamists will spread to the central Asia, to the Russian client states and to Russia itself.
For the same reason, I suspect China government has the same bittersweet feelings.
He’s not alone.
The dims, and RINOs that love them, are enjoying America being humiliated,too.
But, I am also sure, he does not want Taliban to take over the Afghanistan.==
In sweet part you right Putin glads to see American defeat there from towel heads. But on second part you are wrong.
IMHO Putin care les who will hold power in Afghanistan. It is just foreign country which has no importance to Russia. If islamists spread in Central Asia then it might help Russia to curtail Chinese interests there. Which is good for Russia.