It's gotten so bad out there that I've gotten to the point where I just refuse to do qualifying calls. When I can smell one brewing I just email and say I'd like my first call to be one where I can see someone using the software via screen share, or be given the opportunity to log in or have a test account myself. I don't care if I'm talking to a high school intern feel free to screen your big swinging dick's sales guy's schedule but then get your intern show me the fucking thing, the features, the screens, what it does, the basics of how it works.
If I start a call and it's happening I just ask if they're able to show me the software. If they say no, we'll schedule a future call for that I say great press the button in that CRM that qualifies me for that call and I'll log off now.
If they don't want my business good for them, they can run things how they like, but my time is valuable too and I'm the customer so if you can't show me the product fuck off.