It's.. not gated at all....Man I was loving every second of this game, but Chapter 5 has really pissed me off. I dont really enjoy the card type mini games some games offer, and while QB seems alright, I didnt bother getting loads of cards as I hadnt planned on playing it much, was gonna see if I enjoyed it throughout the game then maybe grind them out at the end. Now I have to play against uber Chadley with a basic deck and literally cant touch him. Cant believe they gated the story behind the card game, I will keep trying but no way I'm starting again lol
The whole QB tournament of Chapter 5 is a skippable side quest without needing to play a single match, and the game states it several times.
Also you can abandon the match by pressing start and selecting the option. You can abandon any time and go the next story beat basically.