What Do You Learn From the Underperformance of the Russians?

I think almost everybody thought the Russian army especially would do well in Ukraine and it has not done well. So I've been surprised by that. And what do we learn from that sort of philosophically, if anything? Is there any wider lesson from the underperformance of the Russians? Do you think in terms of how we should treat the next crisis or what we should have known all along? It just shows you how much uncertainty there is when it comes to going to war.