That is fine, but problems arise when you start talking policy in an anthropomorphized context. Sure Russia is behaving like a bully, but that doesn’t mean the UK and other NATO members should call it’s parents and have Russia suspended from school.
Obviously. But when people call Russia a bully, I rather doubt that they're anthropomorphizing them to that degree. And calling them a bully gives a convenient shorthand for both describing their behavior and stating that it's problematic.