I didn't see any Barcelona in the first half. They were like a weak second league team playing against Frankfurt and trying something desperately. Maybe it was because of their not caring about the Europa League too much I don't know. But I certainly believe that Frankfurt deserved this victory fully. Barcelona were nearly turning the game around in the last minutes but they couldn't.
Even if Barcelona managed to equalize the score it didn't affect anything Barcelona still eliminated because they lost on away goals
Eintracht met my expectations before the match and, in response to Barcelona's long and fruitless ball draws, countered with a quick transition to attack in a few passes between the players and always tried to finish the attack with a goal kick. Also, Eintracht spent most of the match, having taken the ball away, did not engage in banal knocking the ball forward, but always tried to organize a meaningful attack. The only thing is that at the end of the match, either because of fatigue, or the players began to worry too much about the prospect of a close victory, but Eintracht stopped playing in attack. 
By the way, yes, I agree that the red card shown to the Eintracht player to some extent prevented the club from engaging in an attacking game and throwing all efforts at the defense of their goal. In any case, a draw in the first match leaves Eintracht's chances of at least a draw in the second match and a penalty shootout, or even a win under good circumstances, because one goal can decide the outcome of the entire confrontation.
