To pick on somebody
Perhaps the word "marginalize" fits this definition?
to belittle = herabsetzen to belittle = herabwürdigen
Dissapointment
Belittle, littleness
No, the word you are looking for is undermine.
He belittled her when she didn't get the right answer.
Humiliate, criticise, demean
Candidates for public office may resort to negative ads that belittle theropponents' records.
Belittle is being little.
debase
Belittle
The verb of little is belittle. As in "to belittle something or someone".