I find your desire to "build a large company" interesting - I shared this until I realized that almost nobody gets out of bed in the morning because they say "I want to build and run a large company" - this is fundamentally unsustainable. Instead finding problems you care about or find interesting might be more motivating and put less pressure on your psychological well being. This helps you get rid of the time pressure you seem to be feeling and will bring a new sense of focus and purpose.