No he's not. I'm sure you can find some Wilder opponents WHO ALSO would've beaten ancient Frans Botha and ancient Michael Grant and lost to Povetkin, Joshua and Parker, like Takam did. Takam isn't anything.
Wilder shouldn’t be worrying about if a certain opponent has already lost to other belt holders he should be worrying about whether his next opponent is better than the ones he’s already fought and in Takams case yes, he’s arguably better than all of his previous opponents.
Wilder fans want Wilder to have a rematch with Sconiers and Nichols..................they do not want him to fight Joshua for sure, not Whyte, Takam, Miller, Ruiz, Povetkin, Ortiz, etc.