I’m not that surprised personally. The Ukraine is not a member of Nato or the EU, so why is anyone in Nato or the EU arsed about this? Or us in the UK for that matter?
In this case it’s for two main reasons - firstly, the sheer cheek of this (which would have been seen as bad form even in the 18th and 19th centuries) threatened invasion of another European state on no pretext whatsoever.
More importantly though is what the Russians demanded; ie: the effective dismantling of the post-Cold War NATO expansion. That does affect the EU, and NATO, and the UK.