Doraemon Fanfiction - Changing the Old Ways

I, Nobita Nobi, have many miserable days of my life. I got bullied, laughed at & left behind all alone. I feel like people treat me too unfairly because of my constant negative traits. It keeps on going & going on forever until it remains the same. What should I do about this? The only way to fix this is to change myself completely, the time to become a better person & the will to have a growth mindset ongoing.