You can never say that Bayer Leverkusen stole the cup from Bayern Munich. Yes, we know that Bayern Munich has been the best champions of the Bundesliga, but that doesn’t mean they will be the Champions. As you can see, Bayern Munich's performance is very poor considering Bayer Leverkusen's performance last season, so I will see no point in your discussion because if a league has no competition, then what are the many reasons for the league and how will it be interesting for us to watch it because we are used to seeing a single winner? But even this season, I don’t have more doubts that Bayer Leverkusen will be the winners of the trophy this season again.
Bayern Munich didn't steal the German Bundesliga from Bayern Munich because they won the league with a high margin. Bayern Munich have dominated the German Bundesliga for 9 consecutive seasons before last season that Bayer Leverkusen ended their dominance and that I think has made the German league more interesting to watch this season. Winning the league without conceding a defeat saw Leverkusen to become the first German club to achieve that. A lot of people are of the opinion that they'll still retain the league this season but in as much as I think it's absolutely possible for them to achieve, I think it'll be more difficult to win the league this season than it was when they won it last season.
Bayer Leverkusen you mean kindly edit:
Bayer Leverkusen outplayed Bayern Munich last season and won the league comfortably with more than 3 matches left to play, Bayern Munich dominance in the league can not be forgotten in a hurry because they were always the favorite for the past 9 season of their reign before Xabi Alonso took charge of the Bayer Leverkusen team and gave Bayer Leverkusen the league trophy with an outstanding performance which saw them become champions without losing a single game.
There are more chances for Leverkusen to retain the league than Bayern Munich because they still have the quality players that won the league with team and the coach understands his team properly now unlike the Bayern Munich team that has a new manager and some new players that will likely take some time to adapt to the performance of the team.