At least, Young Boys managed to maximize the chances it had because it was playing at home, and Young Boys success in making a quick goal in the 4th minute made Galatasaray play more aggressively of course to make a reply goal. Thus, basically the home team is not bad as you said because anyway, if for example the home team is bad then Young Boys will also not be able to make a quick goal like that.
After all, when a team has managed to score a goal, then usually the team will also play more defensively and that is common. But at least, there are still many chances for Galatasaray to score or maybe, because the match is still in the 36th minute at the time of writing then maybe Young Boys who are playing at home also still have a chance to make another goal. But at least, in my judgment it seems Galatasaray will be able to score at least to end the match in this first leg with a draw or maybe managed to comeback, who knows.
Yea, you have said the fact because Galatasaray have been taking the game more seriously in the second half than the first have because they have already gotten their second goal, and it seems like they will not take it easy on young boys any more. Moreover, their performance is not even the same because Galatasaray will definitely want to win the game even though they are playing an away game, but they will have to focus more to achieve the win.
Although the game is now in a draw and it has started to be interesting, and I have the game end as a win for Galatasaray because I see the potential of winning in them today, the manner in which they are playing in the second half is just amazing to me.