I'm honestly going to discount practice hours because it doesn't matter how much you practice if you can't test what you're training in real games. It's why scrim stocks rarely reflect on real game results. Goes for any sport really, you can train forever but most of your experience and learning will happen when you're put into that situation for real. How often are we screaming at our screens over fundamentals and minor mistakes that players should know to avoid? It's because they're crumbling under pressure that they don't face enough.