Embittering

It was a very embittering experience, the climax to what had been for Tony anger and rage with the military way of doing things.

The more openly this despotism proclaims gain to be its end and aim, the more petty, the more hateful, the more embittering it is.

It was a very embittering moment, just a few years before, he was the star to the faculty, and now they wouldn't hire him because he was black.