>>40904690
The world is corrupted and currently a demonic playground. Angels cannot coexist with sin (corruption), so you're not going to see them as often as demons. And even if you did, they'd leave you in a catatonic state. In the Bible, only Mary was pure enough to be able to interact with an angel and remain unfazed.
In Orthodoxy, demons are known to be the principalities of the air that Saint Paul describes in one of his letters. That is to say, demons rule over the subtle realm (what new agers call the astral). It's not the same as heaven, it's a layer of reality that's more subtle, the one you access during OBEs or psychedelic experiences, for example. This is where demons reside. Angels are in heaven (for the most part), and unless God grants you a vision, you will not see heaven in this life.