So it's just complete RNG then? Lol I guess I will keep spamming it all dayPerfect timing here, but right after I posted that the downgrade process started and was successful. It even rebooted normally after the process without requiring me to remove the micro SD card despite having HomeMenuHax being installed.
Now I'm running stock 9.2.0-20E with no problems. It turns out you're not doing anything wrong, the exploit is just unreliable. Keep repeating the steps and eventually it will work. If you need further help, I will stay online and can walk you through via private messages.