With the quality of players Leverkusen currently has, it will be very difficult to compete with Bayern Munich, as Kompany's team is much more developed. Erik ten Hag arrived at a time of rapid development, but several of Leverkusen's potential players have left with Xabi Alonso's move to Real Madrid. The most realistic option is to fight for a top-three finish, as fighting for the title against a much superior Bayern Munich is a significant challenge.
Yes it will be hard for Leverkusen to beat Bayern Munich for title this year especially since Bayern has great coach in Vincent Kompany and strong team. And Leverkusen lost important players when their old coach Xabi Alonso left their new manager Erik ten Hag has already signed talented new players like Jarell Quansah and Malik Tillman. Competing for championship will be huge challenge but Leverkusen main goal is to build new team that can play at high level. They definitely have good chance of finishing in top three and could even do well in other tournaments if new players play well together quickly.