It's more likely that you are being naive, to be politically correct. There hasn't been a single time of crisis in the recorded history where donations hadn't been stolen (and sometimes victims even being abused and exploited). From earthquakes, tsunamis, famine, wars...none of the campaigns went without an incident.

Ukraine is receiving military support from the entire NATO sphere. They can't shoot with your donations and they can't make any purchases either, so guess where the money is likely to end up. That's why I said if you want to donate then do so, but don't ask where the money is going because if you do that you won't donate ever again.