Which multi-cooker do you have? I just bought an Instant Pot multi-cooker for Christmas and so far, I love it. I haven't tried slow-cooking in it yet, but it seems to be well-made and the pressure cooking function works well.
I think it's difficult to cook anything for that long and not have it overcook and dry out. If possible, you might think about changing up your cooking style. Use a pressure cooker to make several meals on the weekend for the week, or make meals the night before, refrigerate and reheat.
Hope this helps.
The trouble with eating Italian food is that five or six days later you're hungry again. ~ George Miller