I hear ya
@Freida. We do have two very different realities. Our supporter reality is easy to grasp (on the surface, more about that below), those of our sufferers often not so much. That's why I'm thankful you're sharing your own reality on here. It does help to get look inside.
People come into our lives and say they love us...but can't cope with this huge illness that rules out lives. So then it's all about changing us
I want to add here though, that it's not quite as simple as you lay it out here ^^. Very rarely does a sufferer come into your life and say, "This is my reality, this is what it looks like. This is what I'm capable of doing, this is what I'm never going to do. Here are my limits, this is what it's going to be. If you can't accept that, go." The reality is often a little less straightforward: "Here, I trust you, this is the part of the reality I want you to see. But I'm coping. I'm still struggling, but I'm working on being able to do XYZ, that's my goal. So bare with me at times, please, sometimes I'll need a little time to myself, but know I'm working hard on recovering and it's not you."
So it's not so much that we come into our sufferers lives and love them on the premise of wanting to change them. What was presented to us in the beginning stages of the relationship was 1. wholly acceptable as to the behavior/reality displayed, and 2. predicated on the changes they said and continue to say they want to experience THEMSELVES for themselves.
Then we start seeing the mismatches between what they themselves proclaimed was the reality and goal, and the actual truth of the matter (which we, supporters, have to gather over a long period of time.) Pair that with the myriad of ways their struggle starts projecting onto us, and one can start feeling a little duped (never consciously, don't get me wrong.)
So on the one hand we get the struggle and we always support recovery, but keep in mind that the unspoken "contract" ^ upon which we entered these relationships as supporters can change and shift and fall apart quite rapidly. And when that happens, it's often boiled down to supporters not having been supportive or understanding enough--that they just don't get it--rather than the fact that we entered this relationship based on a "contract" that did not clearly and fairly delineate what we're agreeing to in the first place.
Forgive me if this is harsh, but from what I read on this forum, as well as my own experience, many sufferers don't want a partner, they want a service pet that exists solely for their well-being and benefit. When a partner fails to hold up to that expectation, it's somehow on them, not on the sufferer who should be taking a look at that expectation (and the communication of that expectation!) in the first place.