I admit I should have googled "tantra for sexual trauma" first. When I did, all I found was a bunch of charlatans who do yoni massages on impressionable rape survivors, so ... no thanks to your tantra.
Perhaps improving your research and interpersonal skills would be beneficial also. If you respond to your wife in your day to day happenings as you did in this thread to those trying to genuinely help you, I can see why intimacy would be a struggle.
Start looking for beginners information vs. info based in trauma to start out with, would be my suggestion, to get a genuine look at what tantric sex really is, beyond the obvious BS gurus, that is if you're truly open to giving it a try. If you've already determined in your mind that it's
all bullshit, then it will likely remain bullshit no matter what.
For a more specific example, look on you tube for a video about tantric sex for beginners and/or slightly lazy people by Layla Martin. That info may or may not suit you and your wife. Have you discussed anything tantric related with your wife to give her a chance to do her own research, or are you waiting until you find something that makes total sense and seems doable to you and you only before discussing it with her?
If you view everything as a problem to fight, fix, and wage war against, you'll likely remain in a state of lack. If you respond from a more nurturing and compassionate stance and try to love and innerstand your way through it instead of fighting your way through it, it may help achieve the desired results a bit smoother and much less frustratingly...or not. Everyone's mileage varies.