Arsenal was kicked out by PSG and not Bayern Munich last season. Even I, the last time I can only remember Arsenal reaching the finals of the competition was back in 2006 when they played and lost against Barcelona, I also think that was their ever first and only final till date. I don't even have any hopes of Arsenal player the champions league finals anytime soon.
Well, thrown out by PSG who then won the Champions League, not by anyone.
I would be satisfied as i probably could have gone further if i hadn't been drawn against PSG, but the point is that matches are random and you can end up against the strongest team of the season, it's just bad luck.