I was also surprised to see the score line at 1-1 in the first 3mins and I thought same as you but on second thought, Leipzig side wasn't clinical in that game, they didn't show any sign of improvement that's why we always see Bayern Munich being the favorite in every game in the Bundesliga, 3-1 can't bring these guys down just that the Leipzig team fail to put up a good fight and is bad that after the Barbarians lost the title last season no team has step up to dominate them if not for Bayer Leverkusen. Leipzig had the game in their hands but it seems they are scared of coming out to play, losing 5-1 to a team you're familiar with is something the manager of the away side should look into because it seems also that Leipzig are ok with the way they are and these are the guy we look up to when they come against a team like Bayern Munich.
Nobody expected the goal to come that quickly. And with the reply goal created a minute later, I thought RB Leipzig would give Bayern Munich a tough fight. But it turned out to be wrong, RB Leipzig was powerless against the dominance of Bayern Munich players in the match, 22 shots were released, 9 shots on target and 5 goals nested in RB Leipzig's goal.
In the 90 minutes of the match, Bayern Munich continued to press the defense of RB Leipzig, making it quite difficult for Leipzig players to counterattack. But no matter how strong RB Leipzig defended, the sharp attack carried out by Bayern Munich had destroyed Leipzig's back line. A sharp attack that I did not see in the previous match when facing Mainz 05
With that calculation or stat you see how poor these guys are and they can't show any sign of fighting back to gain that dominance in the next leg. With this kind of stat Bayern Munich are passing a message to the rest of the clubs not to try to dominate and win them, it will end in defeat, for ones no clubs should think they can defeat them (Bayern Munich) in any way but I believe that Bayer Leverkusen has a way of shutting the Barbarians up in their second encounter.
Leipzig made a mistake by falling back to defend against a side that loves pressing and adding pressure to opposition, that's their first mistake. If the Barbarians succeed in making a team to fall back it makes them stronger and they'll dominate the game till the end and thats what I saw happened to Leipzig.