Earlier quoted context omitted.
For a while I ran DDWRT on my routers, and spent hours learning about FreeNAS and ZFS. And I ran out of patience for it after a few years. I had more important things to do, and people to spend time with. My routers got replaced with Eeros and my NAS got replaced with a Synology. And while I don’t love that the former got bought by Amazon, both are pain free, and I spend a lot less time on them.
Good for you. If you want to have some non-free software in your home, you should have that choice. Someday, I will be skilled enough to run DDWRT on all my routers. But Everyone should have that choice, and plenty of consumer hardware is hardcoded to always serve their manufacturer, and not their owner. I will never again purchase hardware that I cannot control.
You probably already are! It's very easy to run an open-source firmware on a router that you purchase for the purpose. Don't bother with DD-WRT because it supports hardware that can only be driven by binary blobs tied to ancient kernel versions.
Just get something compatible with OpenWrt. My favorite manufacturer of this stuff essentially ships with OpenWrt plus an extra web interfaces, so you can just access the upstream web interface at a different URI if you don't want to install the latest firmware.
The standard OpenWrt web UI is as good or better than what your average router comes with. It's not harder to use.