Couldyou imagine if all throughout humanity's existence some more advanced civilizations have been

“The Three Body Problem” by Cixin Liu is a massive, three-volume scyfy novel. There’s a whole lot to it but one element is horrifying. It’s called the Dark Forest Theory. Basically it suggests the the universe is filled with sentient civilizations but as soon as one develops enough to come to the attention of another it gets attacked and likely destroyed.

The universe is a deadly dangerous place and every civilization in it is hell bent on destroying any other it sees as a threat.

I could inagine. It could be a great book, videogame or movie

That might make a good sci-fi movie but it is silly in reality. The distances are simply too great, and in space, distance equals thousands of years. And humans have only been intelligent for less than 100 years.

If I were to monitor humans, I wouldn't do it from deep space. I would do it right here on earth. Insects would make a good vehicle for monitoring humans, like a fly on the wall.