Your match times take 10 minutes average to pair a team.
Do the math - 10 minutes (in between + first declare) * 18 battles = 180 minutes = 3 hours of waiting.
Less the ceasefire, teams have only 7.5 hours (approx) to get in 18 wins for the win streak prize.
That means teams won't even have enough time to finish the goal.
Even with a 5 minute match time, assuming you have exactly 5 minute time to pair or less, teams can only get in 18 battles to begin with.
I've also noticed the first splash screen was 14 wins for the win streak (more appropriate) and you later changed it to 18 wins.
Please either readjust the wins back appropriately or speed up the declare times.
Thank you.