Oliver Kahn has named his start in the leadership of German top club Bayern Munich “a baptism of fire” and that the recent quarter-final exit in the Champions League still “drives me up the wall.” Former Germany and Munich captain Kahn, 52, joined the club’s board in 2020 and took over from Karl-Heinz Rummenigge as chief executive officer in the summer of 2021. “These first two years here for me have been intense, quite a baptism of fire,” Kahn told the club magazine in an interview published Tuesday. Bayern won a record-extending 10th straight Bundesliga title during Kahn’s first season as CE…