"Insanity is trying the same thing but expecting a different result."
But when life takes away your comfort zone and put you in a volatile state, that's when you have to think, rationalize, had a tug-of-war with your feelings and brain and still probably have no idea what to do. You tried, you failed, your performance could even deteriorate worse than when you first started. For some people, problems and challenges become a stepping stone for them to be better. While for some other people, it just doesn't work as miraculously as that. They have to put a lot of effort to improve themselves, challenged by their own feelings, doubted by their own souls and still walking in the same circle.
It sucks. Life sucks. You suck.
But nothing is going to change if you stop trying.