Yes it will be insufferable
This trap, when well-timed, can completely end a powerful combo of summoning monsters
9 Worst: The Lack Of Stakes Of course, at the same time, with this being an uncanon filler arc, it's pretty obvious that there aren't going to be any real stakes in this arc
Here's a short list of potentially playable cards that allow you to discard aftermath cards for value: As you can see, while red, black, and blue have the most discard outlets, in theory, you can make a discard theme work in just about any color thanks to colorless options like Key to the City and Geier Reach Sanitarium
If the player can find a way to cancel the opponent's attacks or avoid taking damage, they can easily defeat this deck
Unless im missing something of course