Mikrotik is another company that has a good pro-sumer to pro ecosystem. Routers, APs, adapters, long-range point-to-point radio stuff. Most of their gear runs on variations of their RouterBOARD hardware and Linux-based RouterOS, and can be collectively managed through CAPsMAN, which can either run on one of their routers or on a desktop PC.

The configuration side is definitely less slick than what you get with Unifi, on the other hand you can configure everything in detail. You get an astounding amount of possibilities for your money, if you can accept the late-90s/early-2000s style web interface or just use the terminal interface instead.

The only thing I've found lacking is that they don't have any 4x4 or 802.11ax access points yet, but if you go modular (separate router, switch and AP), you can upgrade piecemeal when you need to.

There's still a lot of weirdness in Ubiquiti, even in their UniFi line, that'll throw the average user, but it's definitely a lot more user friendly than the EdgeMax line. I often find UniFi tries to be so friendly that it ends up making things harder. I had an auto-discovery issue that I spent a lot of time troubleshooting, mostly because I can't just tell it "this device with this MAC address is here now", it has to find it for itself.

The UDMP does a really good job just being "the central core of your network you plug stuff into", but it's also confusing because it has the device firmware itself and then the software for each function on it, including the firewall software, which is all very convoluted.