The word 'dispraise' is correct and usable in written English.
You can use it when you want to express criticism of a person or thing. For example: "The teacher's dispraise of the student's work was quite harsh."
Springsteen admires Obama for the health-care bill, for rescuing the automobile industry, for the withdrawal from Iraq, for killing Osama bin Laden; he is disappointed in the failure to close Guantánamo and to appoint more champions of economic fairness, and he sees an unseemly friendliness toward corporations — the usual liberal points of praise and dispraise.
In 1930 he stopped drawing caricatures... "I seem to have mislaid my gift for dispraise.
... .. Sahl is one of the few performers who are willing to be quoted in dispraise of Carson.
When I dispraise, I am usually quoting cliches.
That tongue that tells the story of thy daies, (Making lascivious comments on thy sport) Cannot dispraise, but in a kinde of praise, Naming thy name, blesses an ill report.
Of course, once western culture could be a term of praise, it was bound to become a term of dispraise, too.
"I tasted freedom with him," Heaney says, and asserts the importance of being yourself, and going your own way, in poetry as in life: To get out early, haul Steadily off the bottom, Dispraise the catch, and smile As you find a rhythm Working you, slow mile by mile, Into your proper haunt, Somewhere, well out, beyond.
There is another life story too, woven in with Isherwood's - that of his younger brother Richard, from the start dispraised in favour of the idolised Christopher.
Depending on the politics of their own aesthetics, critics have praised or dispraised Lowry's provincialism.
Edmund Wilson didn't just praise Chaplin at the level due to him, but dispraised Hollywood "gag writers" at the level due to them: he didn't, that is, dismiss them out of hand, but pointed out, correctly, that their chief concern was necessarily with storytelling structures that worked cinematically, and that there might be limitations involved in doing that.
"My father never encouraged me to write, never invited me to go for that longshot," Martin Amis writes in "Experience," "he praised me less often than he publicly dispraised me".
