Screw you all!

Bea had spent her whole life training. Her pokemon and her body were at peak condition. There were very few who worked as hard as her. For a while she was satisfied, she wasn't recognized as the strongest in anything but she was a respected gym leader. But that all changed when size shifts start occuring all throughout the world. Randomly, a few people started to gain godlike abilities over their size. Bea wasn't so lucky. In fact she was a victim. One day, she found herself face to face with one of these goddesses. Bea wanted to show her strength to goddess, to please her. But the goddess laughed. "A strong ant is still just an ant." This stung Bea to her core. But the giantess wasn't done there. As if to just prove a point, she used her abilities to shrink Bea to the soze of a doll. The next few years of Bea's life were hell. Her ego always drove her to train, to feel strong. Now the billions of normal humans on Earth treated her like a joke and she felt like one. She intensified her workouts, far beyond all safety recommendations, she surpassed her previous strength five times over. And yet, she suddenly shrunk more and the next day was pinned to the ground by a school girls finger. "Pfft, what's tthe point of you training. It's so funny to see you flail around. I order you to stop working out. I want you to be more respectful next time I see you." Said Bea's new owner. But Bea never gave up. At one point her owner even broke her limbs. But Bea recovered through sheer will and continued training. But none of it mattered. Bea deluded herself into thinking if she just trained hard enough, she could grow back. To a certain extent, she did. All tinies grew back a small percentage every year. She was doing so at twice the speed. Unhappy at Bea's optimism, her owner even went as far to take Bea to a giantess to be shrunken further, just as a means to break her spirit. Then one day... Years later, when the world had forgotten her. When most of the Goddesses had came and went. Even passersbys didn't notice her. Finally, Bea got lucky. The same energy that had created the giantesses almost a decade ago was released once more into the atmosphere. The tiniest amount found its way to Bea. A couple of atoms worth. Normally it'd mean almost nothing, it would allow some to grow a couple of centimetres. But nonetheless, finally Bea would receive some power. At best it would allow Bea to return to her natural size much faster, maybe even within a year!... That wasn't good enough for Bea. She didn't care about any previous experiences. Finally she had the ability to control her mass. Her body might finally listen to her she thought. That wasn't how it worked. As far as everyone though. Yet. Within two days she grown back to her normal size. What's more her strength to her relative size had increased ten fold. As if her muscles belonged to a far bigger body. By the next day she was a tall amazon. And the next day, her rampage began. She showed no signs of stopping, after years of being told she was helpless, she finally had an outlet for all that effort. The insignificant giantees particles nearly tore under the pressure as Bea pushed them beyond their conceivable strength. If people didn't know any better, it seemed almost as if she was growing out of sheer will. And she showed no signs of stopping. Even a few days in, whole coties burnt and screamed in terror at the furious muscular giantess. She vowed to be the strongest, and the only way to do that was to defeat everybody. Everybody. As penetrated skyscrapers with a kick, she felt no remorse. After all those years, humanity made one thing clear. They were her enemy.