Like, for real, this is as simple as I can think to break it down for you:
Maduro is bad for Venezuela.
The vast majority of Venezuelans want him out.
This is not necessarily a specific endorsement by ANYBODY of the policies you disagree with of the seemingly winning opposition party.
What it speaks to is how the situation there is so desperate that the people essentially want anyone else but Maduro.
That's it. It really is as basic as the people wanting Maduro gone, and the ballot is basically their only way to express or execute that since his control of the military is so absolute. Maduro knows this, which is why he is refusing the release the official voting data to anyone, ally or otherwise, and why he is cracking down so hard on anyone daring to show public opposition or protest to his "victory."