I'm sorry but how are we supposed to believe he's an S level secret agent? He's basically ...

I'm sorry but how are we supposed to believe he's an S level secret agent? He's basically doing anything he can to be blatantly sus... I understand that it's meant to be a light reading, but they could have just made him a rookie or an agent in training: it would have been more believable and everything would have made much more sense, while at the same rime leaving room for comedy