Your hair actually doesn't look that bad. Straigtening takes skill especially with hair as curly as yours. Before I got TR, straightening was a two day process if I did it myself. I would first do it and it would look like yours. Straight but not quite right. I would then pull it back into a tight bun for a few hours or overnight. Then the next morning, I would run the flat iron through it again. On the second day, it would finally look better. It would also help to have too much product like a pomade or something in it. Buying the Sedu helped a lot but I still didn't get perfect hair the first try.
There is a product called Cream Shine by either essations or cessations that my stylist recommended for me. It's kinda heavy and greasy but it helped me when flat ironing before TR.
"Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind." -- Theodor Seuss Geisel