I wrote a comment further down, but I wanted to say that I've gotten a lot of advice from business owners over the years. I have many family members, and my own great grandparents all the way down my generation were all business owners, including many, many relatives.
I've had multiple business coaches and personal advisors as well, and across the board, all of them would tell me that you need to have a full and complete plan before even starting out creating a business.
I did it by the seat of my pants and paid dearly through some near disasters. But I never had 50k invested up front. If you had a viable plan to make this work, you just need to work your plan. If you don't, you should seriously consider pulling out as much money as you can and take this experience as a solid life lesson.
Those that won't quit don't really talk like you are right now in your original posting. My sense is that you have skills, talent in other areas and were trying to get happiness through an area of life you don't excel at.
I hope you figure this all out, all the best to you.