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.
Both domains and VPSes aren't yours. More importantly, your customers will never find it because they're idiots who only look on Instagram. Meta encourages this kind of idiocy, of course. You get to choose: accept reality as it is, or deal in false reality and go out of business accordingly.
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.