I think your hair is beautiful. I know the feeling regarding rudeness about the thickness of your hair. Stylists run away from me & over charge me. But I think if you feel better with straight hair you should blow it out & flat iron it from time to time. Relaxers & Keratin can be disasterous but flat irons, with heat protective products are a temporary release that won't hurt your curls as much. You will also get some versatility that way. You look great curly or straight though. Do what makes you happy.
About my hair:
weekly shampoo-HE Honey I'm Strong
daily conditioner-HE Honey I'm Strong (use as li)
go to style-Pocahontas braids