Try to play the game, maximise material benefit and spend enough time there to get another nice line in your resume, if indeed the name of this company carry so

Try to play the game, maximise material benefit and spend enough time there to get another nice line in your resume, if indeed the name of this company carry some credibility. If you also got a lot of free time bring your own laptop or connect out to some virtual machine and work on your own idea or projects, nobody is going to care as long as you do your job. Then at some stage switch company or start your own, it is a blessing in disguise, your anxiety derives from too much ego, you felt important before and now you are not, don't let it blind you from the benefit you can derive from this situation.