another perspective is that WW1 hasn't ended, and ww2 was actually WW1. Even now, if you look at the Ukrainian conflict from an economic perspective, it's a continuation of the same conflicts of ww1
Not quite. WW1, and its continuation WW2, was a fight between Germanic states on one side vs. Britain and France on the other side. The fight ended (it really ended!!!) when two powerful outsiders (US and USSR) invaded and split the European continent.
What is happening now in the Ukraine is a result of a gross miscalculation without any grounding in reality (no, NATO was not going to attack Russia). The war in the Ukraine is not a leftover from WW2.