Trump hasn't proposed any details on this. At a minimum, repeal it and stopped throwing money out the window into the insurance company's pockets. You are better to stop when a bearing isn't working versus continuing to throw grease on a bearing that doesn't work.

I personally don't have a fix for it. I do actually think a government run insurance company would be better than what we have now. Many health share companies (non-profit) are popping up and doing quite well doing nothing more than providing a health insurance type plan at an affordable rate. If they can succeed, so could a government program that is run efficiently (can't believe I just said government and efficient in the same sentence). That is a potential fix. Trump would never propose that though (or i'd be shocked).