Well first of all, a lot of women fake orgasms because they have been conditioned by society to do so - meaning: make sure they fake an orgasm when they are unable to achieve one, because otherwise you might man the man feel insecure, and his ego is more important than your pleasure.
So you have absolutely no idea of knowing whether those multiple orgasms were ever real. Women don't just lose that ability as they age, so if she can't now, she probably never could.
Secondly, I wonder if you are using your own base of interpretation on her. A lot of your fears and insecurities are based on how you interpret her behaviour, which doesn't make it reality. You may be right, but you also may be way off.
She initiates sex after masturbating in the morning. Maybe she has responsive desire, meaning she needs a long time to let her desire 'stew' and build up before she actually wants to engage in sexual activity? For women, desire often isn't an on or off switch, it's something that has to build up over a long time. Which might also explain why she needs porn to get in the mood, because again, she doesn't have that on or off switch. Even when you're doing foreplay, she probably hasn't had enough time to reach that level of arousal she needs. So she takes the express road, porn, to get her there.
She rarely initiates. Okay, but that's true for a lot of women. What has she learned about the role of women in relationships, or in intimate situations? Maybe she's afraid to initiate? Even in our society, women still get judged for having a libido (as well as for not having a libido, you can't really win this one). Maybe there's something holding her back?
I get that you're feeling insecure, and that must be hard for you. But I'm betting it's not much easier for her. And I find you here, complaining about what she does and doesn't do, but I don't see you trying to really connect to how her brain and her body works and what you can be doing to make sex feel more natural for her.
I think you need to start having very open conversations about sex without focussing on what you are lacking from her at the moment, but with openness and curiosity and a genuine interest in who she.