Ask for different territory or better understand leadership expectations?

Hey folks. New to a territory that’s been declining revenue for the past 3 years. So much so that my quota is greater than all the net new revenue generated over those same 3 years. Almost all of my competition is also concentrated in my territory and I’ve been told that marketing doesn’t have the bandwidth or budget to support any targeted programs to help my region specifically. Customer usage and adoption is also low. Additionally we don't have a lot of case studies for me to share customer stories to use in my prospecting but I've been told it's a big focus for marketing. All in all this is making me question management’s expectations and my chances for success to hit my number.

Is this something where I need to have a “come to Jesus” with my management to clearly understand their expectations? Try my best and look elsewhere if it doesn’t turn around? Or a bit of both?