It's not your fault Yen, don't worry.
But they are very sad to enter a Beginner competition, when they're clearly not Beginners.. They just want an easy win, but sorry to tell you , you won't improve by entering a competition where you have no challenge, so stupid.. I respect most freestylers and especially the ones who entered the Intermediate competition trying to do their best and I bet they've improved a lot more than these guys..