I've only recently starting designing PCBs and I started with KiCad, but I've found it to be very easy to use after watching one video of someone going through a simple board design.
So many things. It was a few years ago that I tried so I don't remember the specifics but it's just generally very unintuitive and makes questionable UI choices. E.g. when you move a component in the schematic the wires don't stay attached to it.
I didn't need a video to figure out how to use Horizon.
I didn't need a video to figure out how to use Horizon.