What should I do about my parents?

Okay, my parents are really great parents. They never physically abuse me and never knowingly mentally abuse me, they stopped a lot of generational trauma to themselves and don't let their toxic childhood affect their parenting, at least consciously.

But I don't like having long conversations with my them because they aren't as open minded as me. They've done a really good job raising me up but there are just few things that don't settle well with me. They constantly try to incline me towards religious path. I'll say I'm not an atheist but I'm not religious either, and I give them so many signs but they can't read it or at least pretend to not read it though they seem very open minded. And they are homophobic, I don't know if I can ever tell them that I'm bisexual, but it's not really their fault too because they never knew about the concept of LGBTQ and grew up around straight people only. They judge others very easily, a girl wearing sleeveless blouse? Yeah she's a very indecent girl. A guy hanging out with his friends and planning trips with them? Yeah he's distracted from life.

And there are so many similar things but you can't blame them for that either, because the way they were raised didn't allow them to open their minds. They worked very hard and couldn't afford the luxury of enjoying their youth. And I was SAed as a 15 year old and I don't think I can ever tell them that because they'll find a reason to shame me, instead of sympathizing they might just tell me how I could have 'avoided' it. And my mom fat shames me but at the same time doesn't allow me to control my food intake too, I have to eat what she serves and anything else or different than that is me trying to starve. Most of it is about my mom, my dad is just too busy with his work and the only thing he talks with me is about my academics and current affairs.

If I run away then society will shame them but if I stay then I might just lose my mind. I don't know what to do.

Updates
5 mo
I'm going to college in September as an adult. I'm thinking of taking a loan and completely fund my education so I don't owe them anything. I'm thinking of using this as my run away plan but I don't want to leave them too. They love me so much. I just wish it was easy to talk them out of toxic habits and opinions which they unknowingly have.
What should I do about my parents?
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