Standing still or holding back blocks highs and mids, gets hit by lows. Ducking blocks lows, evades highs and gets hit by mids. It's one of the few things in Tekken that are straight forward and logical. What's not to understand?
The real problem is the wake up game. I was watching Bronson Tran stream the other day. He would just juggle online players infinitely with Baek because nobody would ever tech roll after they hit the ground. These were players with hundreds of matches under their belts, and they had no idea what to do.
I wonder how of those people quit the game that night, lol.