Erick,
I want to tell you this is not an uncommon event. I know a lot of people (including myself) that received negative feedback and words of discouragement. This is usually due to lack of knowledge and education from those individuals. It is very easy for people to talk down things they don't understand. Find a meetup group where you can learn, grow and share ideas. Never stop learning and communicating with like-minded individuals. Most importantly never doubt the business and yourself. A lot of people on this site have done multiple deals and know this works so the worst thing you can do is let the negative things influence you and make you start believing the bs. Stay positive, stay busy, and keep hustling. It will all pay off and you will soon find yourself surrounded by people who ask you how you have done it. If you need any help running deals or just have any questions feel free to PM me and I would be glad to help.