For Barcelona vs Inter game will not be that easy as Inter can be happy also with a draw in this game so that can make things pretty difficult.
Bayern Munich played well in the UCL but the games in their League were poor. They are in fifth place. Four games without a win. In the UCL I think Bayern Munich are the favourites to qualify for the knockout phase. Inter and Barca will probably be scrambling for second place. When compared to actually I am more sure if Barcelona win. Barcelona is pretty good in the league, while Inter is unstable. The second game certainly competed seriously for second place. The defeat to Bayern Munich is not the benchmark for Barcelona failing to qualify for the knockout Phase, there are still a few games so there are still many opportunities to have.
Bayern Munich may not have achieved the results they wanted in the Bundesliga, but things are still going their way in UCL. I think we will see Barça and Inter fighting for second place. Bayern Munich will not lose the lead to anyone. In defeats in the league, the leading team of the match was Bayern Munich, which found more positions. We can say that they were a little unlucky in these league defeats.
i would not consider bayern to have been unlucky in the bundesliga games where they had bad results, they are not doing well in the bundsliga, that is a fact, but they are having good luck in the champions league in that group stage, but i doubt it very much that their luck will remain for a long time, for me if inter was not at the bottom of the well, bayern would already have difficulties in this group, but they were lucky, mainly because the next 2 games are against an extremely weak opponent, so there are 5 guaranteed points, and guaranteed passage, but in the other phase they won't have the same luck and it will be the end of the line for bayern. in the bundesliga things won't get better anytime soon, but they will also be lucky to face weak opponents in the bundesliga which in a way won't be a total disaster for them, at least it will help them to stay in the top places in the bundesliga
I agree with you that even though Bayern Munich are playing poorly in the league, they are playing quite well in the Champions League. It is possible that they will be the first ones to qualify for the playoffs, while the second position will be decided between Barcelona and Inter Milan.
With this in mind, I would give the edge to Barcelona as they have brought in Robert Lewandowski in the last transfer window, and he has been doing what he does best, which is scoring tons of goals for them. In addition, I would like to point out that Xavi has really settled his team well and they are now playing quite consistent football in comparison with Inter Milan.