I wish pi-hole was just a tiny bit more polished. I found it takes a lot of work (and knowledge of linux networking) to get up and running properly and stable.
After having various weird network issues and instability on a different OS with Pi-hole (updates often broke), I switched to DietPi, and now my PiHole and OS upgrades are extremely stable.
The DietPi installer/configuration for Pi-hole sets up all the networking for you in the install "wizard", took all the weird networking headaches out for me
A few weeks ago I switched to Ad Guard Home. Has been rock solid since. The big dancehaus it doesn't support the exact same filter files.
What I meant is it doesn't seem to parse the same range of formats, so it rejected some of Pi Hole's filters as malformed.