Such a context surely makes illegal actions such as Russia's more likely.
But that's the problem Yeah you keep going on about all the terrible things the West has done and how this context facilitates Russian aggression
When the reality is that Russia is part of that context. Since 1991 it has engaged in all sorts of interventions and atrocities. It is also responsible for the degradation of international law and norms.
Russia has violated the sovereignty of its former republics by supporting separatist regions going back to 1991. It invaded Georgia in 2008.
Within its own territory it waged two wars in Chechnya that collectively killed at least 150,000 people. This included levelling cities to the ground, the use of thermobaric weapons, and constant atrocities against the population.
Russia propped up the Assad regime for years before officially intervening in Syria, during which time it has bombed cities and hospitals and schools indiscriminately.
Right now Russian mercenaries in the Central African Republic are being accused of atrocities.
So again, let's look at what all the leading powers have done since 1991 to erode international law. Rather than acting as if it's just the West making it easier for Russia to violate it.