If you’re willing to read documentation, OpenBSD is best-in-class for a secure, stable home router. The interfaces (configuration, CLI) are extremely simple and the man pages top notch.
I switched to OpenBSD on my desktop and remote server after many years of Linux use. It's now my goto OS for network connected stuff.
One caveat: A power cut during the relinking process that occurs during and after boot can wreck the filesystem. A UPS is advisable. Once the relinking finishes the filesystem is quite robust.
One caveat: A power cut during the relinking process that occurs during and after boot can wreck the filesystem. A UPS is advisable. Once the relinking finishes the filesystem is quite robust.