I don't think anyone considers them not to be incredibly dangerous. But in terms of logistics, organization, strategy, and leadership they have proven to be nothing like they were imagined.

I am no expert but my understanding is that plain old artillery is the main tool being used in this conflict, and that's like how long have people been shooting cannons at one another? If you have 20x as much artillery as your more competent opponent you're still very dangerous.

I wish Ukraine the best vs the invaders and I think they will prevail, but there is no doubt the cost will be high.