You're insane! Gladbach would beat half of La Liga teams easily, they would surely end up in the upper half of the table every season, if they played in La Liga. Don't let today's performance fool you, take it from someone who watches them quite regularly in the Bundesliga as well. It's our awesome game tonight, that totally overunned them, plus they have not been lucky with injuries this season so far as well.
Perhaps I'm insane but this Gladbach boyz play very weakly nowadays.
They played worse than Hercules did, so your baseless enthusiasm has little solid ground.
The worse type of personal judgement on the players is when someone enthusiastically thinks that xyz played a "great game" against a poorly inferior opponent, whereas the very same player is unable to show anything good against a VALUABLE team.
Like: Arda is still slow, sluggish, predictable, etc. despite his three goals, among those only the first one was a nice shot, the remaining two were simply too easy and his last one was quite lucky too.