How does an unhealthy 8 look like ?
In general, what are your experiences with 8s and love? Especially unhealthy ones.
I dont know many 8s, only one quite well. I am pretty shocked how difficult they can be when unhealthy.

There seems to be no right move around them. Everything is a sign that you're enemy. Even if you try to show love, thats "looking down at 8"
Average unhealthy -- To me.. they argue too much.. they let others control their emotions, and the easiest one to control is anger.. so rebelling, and arguing, and staking out for the sake of it all come to mind. Arguing about things that don't really matter. They're frustrated all the time, but they can't see that it is them letting go of that control themselves.. so they're confused by the true source of their frustration. Communication is extremely difficult. They could feel belittled by things that are genuine signs of love and affection.
To me, super unhealthy 8s are those that THINK they're in the healthy parameters. I think any 8 that feels they're in that top-number-1 healthy factor need to re-evaluate themselves. The ones that think they're knights in shining armor, and have delusions of saving everyone, but the reality is they have such little control over reality that they lie to themselves to feign control. Reality is too harsh for them, a lack of control over themselves and others has spiraled outside of comfortable measures, and this manifests in many ways. Communication might as well be filed under mission impossible, and they won't listen to anyone. Anything can be preceived as weakness and attempting to control them.. so they push away everyone, and make enemies out of friends.
I don't know how healthy or unhealthy I am.. but I can say my habits.
When I am in love.. I become super polite. Almost gentlemanly, especially in public, I treat them like I'm trying to ask them to waltz with me at a big expensive dinner for the rich and famous. I'm not one to show public displays of affection at all.. I'm reminded of the driver in The Princess Diaries.. where you could tell he cared for the queen, but he never showed it.. you always just sorta knew from the tone he set. It's obvious who I am interested in, I don't make that a secret, but my actions don't quite reflect that.. it's something people have to pick up.
I argue. Usually, if I am arguing with someone.. it is because I trust them enough that I can show emotions like that, or I don't know them at all and will probably never encounter them again in my life. To me, anger is the easiest thing for people to control, and I do my best to calm my rage and my temper (which is quite short) and I have several coping mechanisms for ensuring I don't get upset. But I like to argue.. I think the right kind of argument helps sometimes.. but in fear of burning bridges for the sake of arguing, I leave these sort of things to people I trust the most.
I force my SOs to say things for me sometimes.

Just the way it is. I don't like to tell people I love them all the time.. I want my actions to speak for me. So they just have to know, which is bad since new relationships mean assuming the wrong things sometimes until they get to know me better.
When someone proves my instincts right. Sometimes I really hate this because I ignore my instincts for the sake of things. I have a guy friend that was SUPER into me.. and my instinct was that he never really desired to be my close friend. But my heart said it's wrong to assume.. and to try anyways. As soon as I start dating another male, suddenly total communication is off the radar. I don't ever hear from him.. It's frustrating to think that I spent time giving people the benefit of the doubt just to avoid being jaded about everything and everyone, but I wasted my time in the process instead of just listening to my instincts.
Probably the most offensive thing for me is when someone does something so blatantly outside of my personality. They assume/say/do something that clues me in that they were never in tune with me in the first place.. Nothing hurts more for me than that.
Them: "NO you dont because you never say it!!"
Me: "I say it everyday. When I did x, I was saying it. When I talked to y for you, I was saying it. Everything I do, I am doing for you.. and for 'it'. How could you possibly come up with any other conclusion?"

I hope this helps.