Gee, I wonder if there were any major shake-ups in the Ukrainian government circa 2014 that could have explained this change in tune.
Ukraine wasn’t able to join NATO because of active territorial disputes regarding Russia’s 2014 illegal annexation of Crimea. The 2022 invasion and intervening Russian-backed fighting in Donestk and Luhansk were naked imperial land grabs trying to force Ukraine back into the Russian sphere of influence despite their democratic processes repeatedly trying to move towards the EU.
Or in simpler terms, imperialism is actually still bad when Russia does it and it’s weird that you don’t seem to understand that.