Self-flagellatory

In this sense, the currently fashionable self-flagellatory school of history is, at the very least, as arrogant and self-centered as the more traditional kind of self-serving history.

Source: wiktionary

There is often a muted mea culpa in these semi-autobiographical musings, a self-flagellatory tone that immediately relieves the reader of any suspicions of romanticism or nostalgia about a bygone age and a lost youth.

Source: wiktionary

I spent a good deal of time on it, wrote her a full response and delivered it back – and then heard nothing more for a few weeks, until I had a self-flagellatory letter from her which concentrated entirely on my negative points rather than my positives.

Source: wiktionary

In war-time, self-sacrifice would be the obvious appropriate antidote to this depression, and some such mechanism is clearly at work in, for example, Vera Brittain's self-flagellatory dedication to her voluntary nursing, ...

Source: wiktionary