The instability that is happening in Venezuela was eminent.
If a democratic presidential will be chosen from the Venezuelan people then the same situation will continue. The dictator should be stopped, but sadly the only way to do so is war...
War is not the solution. A free and fair election should do the trick.
I am not sure about the current approval level of Maduro, but there is a large segment of the population which remains loyal to him. In case the Americans go ahead with a military invasion, then his support base will grow and many millions will revolt against the invaders.
Till now, Juan Guaidó is unable to create a sizeable militia to fight against Maduro. He wants the Americans to do the dirty work for him. That's not going to work. If he has the popular support, then he can easily overthrow Maduro from power (just like what happened in countries such as Libya). If he is not capable of that, then I suspect that his support levels are quite low.
You think Libya overthrew the government by themselves? That is cute. That was an intervention I did not support and the results were horrible, especially for the Libyan people. It is kind of hard to have a free and fair election when a dictator is in charge, especially when he has China and Russia's state power backing them. I can't say i want American troops in Venezuela, but I also am not naive enough to think we can allow China to use it as its South American military hub complete with fuel supply either.
There are different scenarios proposed from past history in the Americas. Intervention doesn't necessarily mean old fashioned troops on the ground (which is what those supporting Maduro would want). One of these was actually used in Libya, which was air control. Only this time there are far better unmanned flying vehicles that could establish 24/7 surveillance while... A surgical operation picks out the problem to be trialed in Hague or elsewhere (like Noriega).
But why would America spend resources to this end, what is IN for them? I don't think much, yet.
On April 30 they tried for the last time to convince the Venezuelan military to join Guaido. The 3rd in command (Maduro and Padrino being the first two) was surprisingly involved in this last attempt. That day it was evident that they didn't want to, so they aborted the operation and fled the country or went underground. The 2nd in command (Padrino) acted as if he was also going to defect, but didn't, and in fact lied to the Americans.
I'm not going to go into details of why the military won't participate in overthrowing Maduro anymore, but i can assure you it is not an act of loyalty, but more of survival. It is not evident that the situation will change any time soon, and they don't want to risk what little they have left. And, Chávez left an intelligence network inside (glorified snitches emulating a Cuban method) that makes everyone distrust each other. Besides many in the military participate in corruption or other criminal acts, they know if they fall they all fall. There is no hope for the Venezuelan military anymore.
What IS left? Not much, really. The opposition is not going to accept any elections where Maduro or anyone representing that group participates. Maduro on the other hand can eternally re-elect himself unopposed.
In the meantime, while this status quo remains, people keep dying. Sometimes demonstrators, sometimes the rampant crime, sometimes hunger or lack of medicine, but everything closely related to the State, or lack of. Unfortunately it is a State that cannot be criticized, where people can be detained without reason because you can't go against the authority and that is that. It is not exaggerate to think of Venezuela as a country being held hostage, with the victims living in it unable to do anything about it. Others see it as a giant prison, which is more or less the same thing.
If Maduro falls and is taken prisoner or such, millions will NOT go out to defend or rescue him. Maduro IS NOT Chávez, this is a critical difference some people don't quite understand. Sure some "leftist" groups would, probably go guerrilla warfare or so, but nothing resembling half the population like some would think 10 years ago back when Chávez was alive. This is a completely different Venezuela (or whats left of it).
Another possible scenario is neighboring countries forming a coalition to intervene. I think both Colombia and Brazil are willing to. This could probably be in coordination with the American complete air supremacy doctrine.
One idea is that after watching for real an intervention unfold, Maduro just might break and resign or surrender. Or he could play Martyr, it is unknown.
Do note that the opposition to Maduro is not equal to the support for the political opposition. There is also, a lot of disillusionment with them, even Guaidó. Due to their mistakes, lack of action at times, or late moves, hidden deals with the gov, etc. There are two decades of that already. Many people just gave up and left the country. Others just fled escaping poverty, and in some cases political persecution. About 10% of the population.
The approval rating of Maduro? Its like 15~20%.