A federal judge who four months ago described bullying in the nation’s schools as a problem of “epidemic” proportions, yesterday ruled that a kindergartner who twice had a braid cut off by another student has no constitutional damage claim against the New York City school system.

Eastern District Judge Jack B. Weinstein, in a fact-specific ruling, held that the youngster’s parents failed to raise facts of “shocking bullying” necessary to make out a constitutional damage claim for deprivation of substantive due process.