Trying to make people in certain ways isn't mind controling them your parents at best can try control your mind in some screwd up examples but doesn't mean they can do that your paretns only have influence on you not control over your mind that is diffrence between what demon what demon was doing and what your parents are doing... Same for pets... so yes it has a lot to do with anything it is like comparing paret forcing you to do homework to somone forcing you to be slave in mines...
The only difference is scope. Demon was able to shape Templar's mind to bigger extent than it's conceivably possible by raising the child, but the idea is the same - make the person think the way you believe it should think.
Omg haha i rly shouldn't even dicuss with you... demon mind controled that guy into thinking he loves her and loves his children (that don't exist) and that he is ready die for them please dude but she made decision for him that he loves her so yes she mind controlled him and took away his free will to decide for him who he loves. So at this point demon had comple control over his mind....
Now you just make assumptions on top of assumptions. The demon created the fake family the Templar wanted. He pretty much loved this would-be family before it happened, that's what drove Desire to him in the first place. And once again, the demon merely manipulated the templar, not completely mind-controlled him.
It first place stop making false assumptions because i never said that...
It wanted hurt him in fact as i said it harmed him already practically taking control over his mind despite he didn't agreed so yeah...
As I said, you mess up hurting somebody with wanting to hurt somebody. Easy example: parents trying to "cure" their child of... whatever, being homosexual, for example. Does the treatment hurt the child? Often, if not always. Is it malicious? No, usually not. And it pretty much comes down to an attempt to "control his mind" (by realistically available means, some psychiatric "treatment" or exorcism or whatever they come up with).
It's the intention that counts and your only clue as to the demon's intention is "it's ademon hurr-durr it's evil it wants to do harm".
Omg haha short encounters most demons outright attack humans pretty much we fight most of them through series so yes they were malevolent. Then we have demons that we interaced with like uldred , connor , baroness ,kitty , ishmael solas friend that turned into demon ,demon in the fade in daa those pretty much all of them were malevolent despite they were ready to bargin.
How did you manage to not understand me, really? Ok, once more, slowly:
You meed spirits that attack you on sight and those that try to f*ck you up one way or another AND those that don't do any of the above. It's basically then that you decide whether you consider something a spirit or a demon and try to push it into one of those categories appropriate for "demons like this one". But when you try to make predictions, they fall flat. Sloth Demon in Magi Origin is actually helpful. How can you call something malevolent when you need to really pester him to make him do anything against you and even then, if beaten, it helps you?
Wisp in fact aren't spirits well even not demons (or are they? i would say they fit into demon category) wisps were demons that were killed or spend too much without body in "real" world.
Wisps are also spirits, they're just severely crippled (generally by dying somewhere along the way). They can be dead spirits of any kind (demons included, obviously).
Also sloth demon said he would pretty much possessed you if not that was too much effort for him. 
Yet he doesn't make the slightest attempt to hinder you in any way. On the contrary, actually.
Yes post example of demon that wanted possess the warden and when he failed he said nice thing totally not malevolent... 
And Valor tries to kill you. From what we know, for a Pride demon possessing an apprentice forcibly should really be just a breeze. He doesn't try it. He doesn't kill you even. He compliments and warns you and lets you be. You don't know anything about its motives, really.
so no it isn't oversimplification it is simple as i said classification of living things in the fade and it fits as far as it is shown in-universe.
It's repeatedly shown to be more complicated than this and we're many times told (in codexes and dialogues) that it's more complicated. Therefore it's an oversimplification because the classification is hardly as clear-cut as you would like to have it.