You won’t be able to hide your feelings indefinitely. The boss will know exactly what you think of him or her. And you will feel unlimited stress and emotional pain day in and day out.
So what to do? The obvious. Write up those tailor-made resumes and fire them off to every potential employer you can find. You only have to do it once a week. And the time you do it is every Sunday afternoon (assuming you work M-F, otherwise adjust schedule accordingly). Then check your voicemail every noon and night. And check your email every evening. What the heck, maybe fire off another resume or two while you're at it.
Did I say you can’t work for a boss you despise? Actually, you can by just doing as described above.
How? That is simple, too.
Now during the workweek, whenever your boss does something particularly stupid, unethical, or otherwise disgusting; you can switch your thoughts to thinking about all the potential employers you sent your resumes to last Sunday. In other words, you have now given yourself hope and positive thoughts to draw on.
And sooner or later, an interview invite will come. And sooner or later, a job offer will come.
And you will be out of there.
Here is a list of job search resources.