Ok, you can think that. If you were a neutral fan you would see it differently.
That is not a matter of thinking. Arsenal was on fire from minute 5 to minute 20 and they could easily have scored 3 goals if Bayern would have had a lesser goalkeeper. From there on out, after Bayern had adjusted their pressing which was way to high up the pitch, Arsenal did not threaten the goal any longer, since Bayern had possession and dominance. Most of the match was happening in Arsenal's half of the pitch. There were occasional losses of the ball, allowing Arsenal to gain a bit of space, but that was it.
I was worried for the first 20 minutes, after that I wasn't. If you seriously claim Arsenal were Bayern's equal right up until the red card, you are only lying to yourself.
They were clearly better the first 15 minutes, if not even 20 minutes, but after that Bayern slowly suffocated them.