Is your management expecting you to do it faster? Then you need to put your management in touch with the managers you're talking to.
Do you think your own longevity at the company / bonus / performance review will be impacted? Then you need to talk to your management and make them aware of what's going on and that you have gone above and beyond to try to make this work but are still hitting a brick wall.
Do you have nothing else to do at work and you're stuck? Then find something - either by talking to your management, again, or by asking around.
Do you just want to feel the pride of a job well done in making some company's VM deployments slightly more compliant with policies set by people you clearly already dislike for good reason? Then take a step back because you've spent too much of your life living for this startup and not for yourself.