I was fairly critical about how Matthäus was used most of the time, but I don't think anyone ever said you need two defensive minded midfielders behind him. Still, the problem is that most managers used him in his post injury version and claim to get peak Matthäus (the same is more or less happening here as proven by
@Raees using a game from 1994 to show the role he wants Matthäus to play).
If you want him to be the deepest midfielder and shielding a defense, then at least admit that you're not playing the peak version of him, which was an attacking box to box midfielder with almost unlimited freedom. Obviously his energy and workrate always contributed massively in defense, but at no point did he play a tactically restricted defensive role during his peak years. He was a direct attacking player, who could carry the ball, dribble and pass. He'd steamroll through almost every midfield he faced and to let him do what he does best, you don't want another box to box midfielder next to him, but a holding midfielder who stays in his position and covers for Matthäus' runs. The fact that Matthäus adapted after his long injuries and was capable of playing a less energetic DM/libero role shouldn't really overshadow what he actually did during his peak years and what won Germany the World Cup, Inter the league against Sacchi's Milan and himself the Ballon d'Or.