Pat was right

[floramon]

I strongly believe that this series is lack of training.

When Barry Allan became The Flash, he did some trainings with Dr Wells. Before and after Oliver became GA, he did many trainings. Wayne also did some trainings before becoming Batman. Spiderman and Iron Man did self-training and learned from mistakes. Supergirl also did some trainings with her step-sister. Batwoman also trained with a man in episode 1.

Stargirl defeated Brainwave in episode 2, that was fast! And most important, she was NOT trained.