I'm going to ignore the description in most of your post, because I'm not sure where you accumulated your information or perspective, but it needs a lot of readjusting. I'm not going to criticize you, I'm just going to say that much.
Since this all is in your mind, it is not less real but it is entirely you--manifestations of your ideas, thoughts, beliefs, and emotions on a conscious and subconscious level. So you must understand that you are in 100% control of this place and what occurs there and no one else has access to it.
Any "guardian" is a thoughtform or also known as a servitor that you create to perform a certain action. However energy, when given the belief of containing a "mind" and especially when believed to have emotions, will begin to react and think much like their creator. Therefore they will react to what they interact with and their environment and they will change.
If you look into golems, those who make such things will create a safety destruction method so that WHEN not IF their energy creation has gone out of control, they can destroy it by destroying an object they based the thoughtform on/linked to it upon creation. Those who use servitors never keep the same servitor for long and will usually destroy and create a new identical one a week or month later (depending on past experience as to how long it takes for them to start gaining their own sense of self).
Thoughtforms can get very creepy when left to their own devices. We are human not divinity and therefore cannot create perfect thinking energy. It will begin to corrupt and twist and turn into something quite ugly if not kept close watch over and destroyed/recreated every so often. Casted magick does not do this because it is not thought to have its own mind. We either control it or have spirits/deities govern it's direction.
Basically since it has no soul, it has nothing to keep it balanced like we do. It has no foundation of experience and memories. Therefore it is a newborn babe that can have temper tantrums and is pretty much "wild" once we leave it to its own devices. It will obey its orders until it gets strong enough to break free and rebel (kind of like a teenager! Lol). No amount of time spent on it will ever allow it to be perfect, because we are not capable of creating perfect life. Basically never let it get to adolescense. =)