Mental clarity is not the goal it is just a side effect of having the courage to face your internal struggles and actually do something about them so there are always reasons why people feel lonely, aggrieved, tired and unfocused.
Very few people have the patience to dive within and actually go through the process of understanding yourself be who they are connecting with others and also doing what is actually right for them.
It might take time but but that is the right thing to do when it comes to living your life and also making it work and progressing in life.