That is because plot demanded Cell to lose no matter what asspull it took.
Jobhan on the otherhand, was supposed to be the new MC after Cell but during the Buu arc, was relegated to the role of side/secondary character and now is verging on being relegated as a background character appearing neither in the manga nor the movie.
Face it, without Cell, Jobhan would be a litteral nobody with no wins of any significance. Even Tenshinhan would be better than Cringehan in this regard.
So cope harder, Copehan.