Being worn out is not a failure. Jesus calls the ones already carrying too much, and what He offers them is rest.
8 verses · KJV
Come unto me, all ye that labour and are heavy laden, and I will give you rest.
Take my yoke upon you, and learn of me; for I am meek and lowly in heart: and ye shall find rest unto your souls.
Cast thy burden upon the LORD, and he shall sustain thee: he shall never suffer the righteous to be moved.
And he said, My presence shall go with thee, and I will give thee rest.
From the end of the earth will I cry unto thee, when my heart is overwhelmed: lead me to the rock that is higher than I.
But they that wait upon the LORD shall renew their strength; they shall mount up with wings as eagles; they shall run, and not be weary; and they shall walk, and not faint.
And he said unto me, My grace is sufficient for thee: for my strength is made perfect in weakness. Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me.
Be still, and know that I am God: I will be exalted among the heathen, I will be exalted in the earth.