That's not unusual for an Megaten game. Hell in Digital Devil Saga, I had my guys nullify everything except Almighty and almost had a full team wipe to one of the optional bosses because he started the battle with a Mind Charged Almighty Attack.
Sometimes you're just unlucky and these games tend to be very unforgiving. You'll just have to suck it up and try again. Especially if it was only one time.
I think more importantly, there would have to be other people that touch TVs and got some weird Stargate Event horizon moments like our beloved Investigation Team. It's just one of those "Suspend your disbelief" kinda things.