You gave up after just 4 months? It takes years to build any business. I sell via several print on demand sites, and it takes years of effort to build a brand. 4 months is no time at all to give anything a chance. Business is tough. If you believe in something you need to give it far more time and effort.

With Print on Demand it is particularly tough with all of the competition this is true. I wish you success in the future, please give yourself more time to succeed in whatever you choose.