Bed making is a huge challenge these days. Three quarters of an hour sounds quite good going to me! I can only suggest getting somebody to help you, provided they go at your pace, I did sew tapes onto the duvet and inside top corners of some of the covers, so can put cover on inside out, tie them to each other, and then pull cover down over the duvet. OK in theory, but now even that is exhausting, especially with a heavier winter duvet. And turning the mattress is a complete impossibility for me, it is sooooooo heavy, a very deep five footer! My partner does it, when asked, and I usually get my cleaner to help me do the sheets etc. Can't believe how difficult it is to put a pillow case on.
In fact having a cleaner is a new thing for me - she does two and a half hours a week, vacuums through, dusts, does bathroom and cloakroom, kitchen etc. I just got to a point where I was so slow that I would have spent all week doing that amount, and had terrible backache tool. My taps have never been so shiny!. And I have managed to get back into my studio, having done no painting for well over a year. So, I may be poorer but my head is in a much better place!
Best wishes and sleep well!