Most software is a terrible pile of unreadable code with no tests and horrible architecture choices, that somehow manages to keep working just through the power of years of customers finding bugs and complaining loud enough to get them fixed.
If you write any automated tests at all, you’re already better than most “professional” software companies. If you have a CI/CD pipeline, you’re far ahead.
All of my Bluetooth devices work flawlessly these days. What are you using?