CyB etc aren’t ‘better’, they’re just different. If you want a real nice big ride, loads of rocky singletrack, big climbs, big views and get back to the car feeling knackered and happy then CyB etc are the ones to go for.
For a couple of hours messing around on the bike, ripping around stuff flat out, jumping, sessioning bits and getting back to the car feeling as if you might have conquered something new be it a jump or drop thats always evaded you then Llandegla is the place.
As someone else said, horses for courses. Llandegla is like one massive BMX track come skills loop come Stainburn on a massive, slightly more mainstream scale. Can’t really compare to the likes of CyB, Glentress, Penmachno etc etc.
And as an introduction to mountain biking with its proximity to big towns etc, you can’t argue its a bad thing?