It ruined everything

My story:

I was 8 when I was exposed to porn. I was too young and my mind was not fully develop to process all that stuff. As I grow it went away from my life for a year or two but when I turned 12 it came back. I remember the rush that I was getting from it, in other words it was really messing with my brains reward system. Years went by and in 10th grade I realized that there is something wrong with me or in my life. It was the point when I recognized my problem and it was my addiction to pornography. Things would be so much better if I chose not to watch it in the first place. But what could I do as a small kid at that time. I wish someone warned me about the dangers of pornography. I ask why I was not stumble upon anything referring to the harms of it. It was a rosebud for me which I think I opened too early in my life.