Hi
There is a tutorial on iFixit on how to remove the motherboard: [guide|22322]
Unfortunately, taking out the motherboard does require desoldering, but other than this it’s a pretty painless process. You will not need to tear down the entire camera.
Before replacing the card reader, you can try to carefully bend the pins back to their original shape.
Still, i’m inclined to believe that all will be fine once you’ll get the card out.
To prevent further damage to the reader, do not use excessive force and make sure you only grip the card and not the slot itself.
Cheers!
Bogdan