Because Arsenal is at away the reason you said the club has bad result with Bayern Munich? Do not forget that Bayern is not also a small club and it is in the second top position in Bundesliga this season. Did you watched the match? I think Arsenal tried. It is true that it is possible that Bayern may become stronger at home and the club might win Arsenal. But about EPL, as Arsenal has chance not to be the winner, but it also has the chance to win the EPL this season. I hope Arsenal will not disappoint again in this season.
If you look at the Arsenal vs Munich match you can see that Arsenal played very well and solidly that night. But Munich is not a small team that can be beaten easily. So I think this draw is fair because the strengths of both teams are equal and they are at their best.
I believe Arsenal has a great chance of winning the English league this season. They just need to maintain the consistency of their play until the end of the season. I don't think Arsenal have any difficult matches in their remaining matches.