Russia actively responds to threats and has been doing so for quite some time. First, it took Crimea. Then it sent lethal support to the Donbas. Then it sent mercenaries into a bunch of countries in North Africa fighting against the West. Then it launched an SMO to militarize the border with Ukraine. Then it attacked Western Ukrainian infrastructure. Then it built an Africa Corps. Then it created economic alternatives to the West. Then it materially supported the West's adversaries. Then it made a change to its nuclear protocol. Then it launched an IRBM.

Russia responding to Western salami slicing with its own salami slicing. Just as the NATO escalations are nuanced, so are Russia's responses. NATO countries still live in peace because they have not declared war on Russia yet. Every time they make another thin slice of the salami, Russia finds a way to respond that is just as thin. However, Russia launched the capture of Crimea and no one could stop it. Russia launched the SMO to secure the Ukranian border and no one could stop. Russia worked to support decoupling of Africa from the West and no one has been able to stop it. Russia is working with partners to work around Western economic dominance and sanctions and no one can stop it.

The Russian military has not made many mistakes and it has not been strategically inactive. From this, we have to conclude that Russia understands its own limits, and I don't think anyone, especially Russia, believes they can or need to fight all of Europe. Likewise, I think Russia is aware, as NATO is aware, there is no way NATO could defeat Russia. The risk, therefore, is that NATO chooses to engage Russia in a long-term war of attrition, and that risk is very very real. Russia's strategic imperatives are therefore 1) to not become encircled, 2) to maintain counter-intelligence supremacy, and 3) to avoid a protracted war of attrition with NATO.

is why Russia took Crimea and subsequently invaded Ukraine
is why Russia is being judicious with deploying its technology and why it is operating in Africa
is why Russia is supporting the opening of additional fronts in Africa, building material support with military powers aligned against the West, building economic alternatives to the West, and most importantly, not giving the West sufficient casus belli to launch an all out war of attrition

You're requirement that for Putin to be strong he must be irrational is ridiculous.