I ran a competing project[0] on my home network for a few years before I discovered NextDNS[1]. What I lost in performance (requests don't leave my house) I gained in portability: ALL my devices can take advantage – at home and away – and time-saved. PiHole works 90% of the time, but when it did stop working, I'd have to spend a bit of time fixing it. At $20/year, I simply couldn't compete with NextDNS. Note: This is…
I'm curious what issues you ran into with Pi-hole? I was running my instance for years without a single hiccup. I ended up moving to AdGuard Home about a year ago though because I wanted to run it on my OPNSense box. I have an automatic WireGuard VPN set up on my devices to VPN into my home network when I'm not connected to my SSID, so my local DNS still works remotely.
For the price of a single Pi, I can get NextDNS ad protection for _all_ my devices for multiple years. No matter where they are.