Here's some honest, if painful advice. Start working on your resume and looking for a new job, if only for your own sanity. The senior leadership are jumping off with their golden parachutes and don't give a flying cr*p about you. Your superior likely can't help you because there is no funding for appropriate staff levels. I've been through this at other companies and the light they promise you at the end of the tunnel is the train coming full speed.
Take care of yourself first.
Bumped so more people can see it. Original is at @xfm+1cVh0nxZ.