I think apart from the red colour hair being in your family, I think the type of product you use also affects your hair too.
Although I have on natural now but there was a time I started using an Ozone relaxer, and I hated the day I started using that product. Although it relaxes my hair but bit by bit, my hair became different shades of colour.
Your hair is beautiful and long too.
If I relax my hair I get black, red, and gold at the tip making the hair beautiful, and if I don't the colour of my hair is nothing to write home about.
Oh dear, I guess we have same texture of hair... Relaxer is very bad for our hair but we can't maintain the hair with them