I don't think acceptance is about losing hope; I think it really involves gaining it. Acceptance about realizing that what you're dealing with isn't the the norm/healthy/working (or whatever may be the situation depending on what you're trying to accept). You can't truly improve a situation until you accept what it for what it is.
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I think that's why I'm going to really get better this time--because I've realized "this is a problem, this is one aspect of myself, this can be worked on, and I will work on it." Yeah, it freakin' sucks right now and I'd rather live in denial continuing to spiral just because that's how I've always lived and I'm comfy that way, but right now I have hope that the future--through hard work in therapy, taking meds as prescribed, using learned skills, and finding a good environment--will hold better things.