Top teams have to wait an average of 30 mins between matches which means even with 100% win rate and no bugs from Gree we are looking at 75 hours to complete the guild quest. Considering the event is only 73 hours long either something needs to be done to fix the long wait times top teams face or reduce the number of wins.
Ideally the first since it is ridiculous that **** teams get matched instantly giving them a huge advantage over teams that have to wait longer.