Guys, y’know how Neville was really bad at magic for like the first five books? And he started to get good when he really pushed himself in the DA?
But then, he actually becomes pretty great from HBP on?
Well, in OtP he mentions that his grandmother would kill him for breaking his dad’s wand.
The wand was his dad’s.
The wand chooses the wizard.
The reason he wasn’t as good as he could be was because the wand didn’t choose him.
Then he got his own from Ollivander, and he became like the most badass student at Hogwarts.
Neville was always a good wizard, it was just his wand.