I've dealt with this for 60 years, I have 6 relatives that are autistic and the one thing I have learnt is that there are many difference and variances in the presentation of autism. I have oodles of practical, lived experience in comparison to you.
My brother has no problems with living on his own, managing his finances, washing, dressing, travelling, driving or dealing with complex practical matters hence his official diagnosis back in the mists of time when as a HFA. And yes things have got more PC now and quite rightly so but the fact remains that my brother was capable of living and working independently unlike others in my family who cannot. Its his interactions with people and demand avoidance that are his particular issues. And just because someone is autistic, does not rule out having other personality quirks too.
I have never minimised autism but your daughter sounds like she is trying....,my brother gave up a long time ago. He needs support, I try to give it but he makes MY life very difficult i.e he moved 200 miles away and still expects the same support from me! He needs to help me to help him, he is autistic not stupid.
He does not tell people he is Autistic until he has irrevocably boxed himself into a corner and then he introduces the fact - hence me saying he uses it like a "get out of jail free" card. I stand by this. I never said your daughter did this, but my brother does. You seem to miss the point in your own comments that an autistic person can be high functioning in one area and not another and therefore my brother and the OPs DH may very well be vastly different to your DD, hence a different set of problems that you have not experienced.
Yet you appear to advocate that I have to sacrifice my entire life for him? I am not his Mum, I am ONE of his siblings.
And yes, I do have a problem with my Mum, as she does not understand autism at all and she enables him. She does not support him, she surrenders to him and always has. It does not help him, in fact it aggravates his situation as people do not know how to react when he kicks off and she just ignores it rather than smoothing the way and helping, so people avoid him. It then isolates him more which magnifies the issues which she is leaving me to mop up. As a carer, not his MUM, I have every right to express my concerns and how I am on my knees. Bully for you if you are managing, but with three people to care for, my own ill health, a full time job and my own family to look after, I am buckling. Their response was that I should get a less demanding job! So basically the load being placed on me is OK, its my job that is the issues....really! Well, yeah but less demanding job means less money so how I am supposed to support travelling backwards and forward to deal with their needs and the time I need to take off.
The OP is in a similar position, but the difference is, that he has changed and he is nothing like the man she married as he was masking, not intentionally but she didn't know that. The man she loved no longer exists and he has given up.
When you get to my age and in my position, come back and talk to me then.