How can we defeat Bayern?

Its obvious that Bayern already won this season. But how can we compete against a team that has twice our income, is a marketing machine, and its the most famous and succesful club in Germany? I am wondering what does this team has to do to fight for the Bundesliga without relying on Bayern having a bad season. But most importantly, how can we fight not just one season, but really be a contender every year? Also, how did Bayern make a gap that big with the rest of the league? They have a great financial management, but there's gotta be another reason. Because its tiring to see Bayern dominate every season, and no team can keep up the battle with them, not us, not Leipzig, not even Xabi Alonso could do it for a second season. Its really frustrating. I dont care that Bayern is good, but i think is worrying that no other team can aproach them. What do you think guys?