This is really bad advice--realizing that you've spent years of your life punching a clock, working on projects you don't care about, and failing to grow as a person is awful.
The "taking it like a man" thing to do would be to leave, or present concerns to management.
I understood he took the job to get the funding he needs for his startup. This is not a purposeless clock-punching job, the man has a plan, stick to it or change it.
The "taking it like a man" thing to do would be to leave, or present concerns to management.