The main wall between you and your success.... it's you!
Jim Rohn said it well in that quotes. We worry too much about others bringing our business down. Our main problem is us. If we can face our problems and go ahead we'll succeed.
When things are not working as you would like, start to work on yourself. Become a better person and your business will go better.
Put as much time on yourself as you put on your business. Your business will grow with you.
There's no short cut to success. Just a lot of time and work. On yourself and on your business.