Buy a domain and make your own system. Only use other people's platforms for marketing and pr, or as commodity providers that are easily replaced. You can make your own business that you actually own and control. It's even cheap - only need a domain and a vps.
My team and I produce tons of software for consumers, but we open source all of it for free. Proprietary software should not exist and consumers are getting raked over the coals enough as it is.