Save my marriage - sliding doors

Since we moved in, the sliding doors have been the bane of our existence. My husband tried to fix them a few times. As soon as someone (👀👀children) TOUCHED them, they go out of adjustment/rails? Is there another system we can change to, seen some kits at B&Q but no idea what would actually work well in this space with the door we have.

Husband will soon go mad of he has to fix them again.