The Ukrainians are better trained, theyre just having problems with the fact that the Russians are using unique technology like "mines" and "planes".
Russians are employing this dastardly new technology called "mines" which no army on earth has encountered before, least of all those of the NATO members like France, Germany and the UK.
There are no mines, it's all just shovels. The Ukrainian forces step on the shovels and get hit in the face. Russian shovel technology is too advanced for NATOists to overcome.