Also, the decision to give a second yellow was really shocking to me, too. Any decision in this game makes no sense to me at all.
This defeat is not the end for Galatasay because they still have a chance in the second leg to be able to turn things around in front of their own supporters. Galatasaray still has a lot of time to evaluate their squad before the second leg starts especially the defense line and must be able to score a quick goal so that their confidence increases. Moreover, the Galatasaray squad is superior to Young Boys because Galatasaray has several star players who are experienced in dealing with situations like this.
It's not over yet until the second leg. The talented Galatasaray can fix this. Batshuayi scored easily upon arrival. That guy's a natural goalscorer. So, what do they need to do? Defense must be tightened. Stay focused and disciplined. The same fire they displayed in previous dominating moments must be shown again. They could win this tie if they can do that with the home fans behind them. Its difficult but achievable.