Yes Russia points to Iraq and Libya, and they may be right. We can point to Georgia and Ukraine, and maybe we are right. At the end of the day, and I'm repeating myself because people forget this constantly, rules and laws don't mean _anything_ unless you're willing to back them up with consequences -- and in this context, military might.
It's just like raising a child. When a child starts kicking you in the shins, you can say "please stop dear" as much as you want, they'll keep doing it until there's consequences. Might not need more than a strategic targeted pinch in the ear that hurts just enough to back up what you should've said: "That hurts, stop it right now."
This way of removing Maduro wasn't excessive force. It was a strategic pinch in the ear.