I used to use dd-wrt, but I later settled on ASUS routers, and installing "ASUS Merlin" firmware on them.
I find ASUS hardware high quality in general. And using an open-source project like ASUS Merlin means the pain-points and limitations that I would face with stock firmware have been resolved to (at least to satisfactory extent) when I need reach for the hacker type configurations.
Same journey for me. Merlin does everything I need, and it's actively developed. They drop support for older devices too quickly, but everyone in the software industry seems to drop older devices as soon as new ones hit the market so they're no worse.