Victories coming at a cost is not something new and info on how severe they are is hard to come by due to the fog of war. So unless you have a decent source, this point is kind of useless.

What good reason does Russia have for it's full scale invasion?

And next: I don't know why I should be the one looking up how many conscripts Ukraine has when it is your argument. Why don't you look it up yourself?

And what should the west do to protect themselves form Russian aggression in your eyes? If this is not the right way to do it.