There's no conundrum. He is not very good. Not very good coaches have respectable cup records all of the time because cup football is subject to a huge deal of luck, especially competitions like the Europa League which is hugely subjected to "does this team care about this a lot/do they have much to play for in the league?" and if the answer is no, teams generally progress well in it.
What we have done is essentially fall back on a relatively pragmatic/practical style to win a few games that under any normal circumstances would be considered a walkover. Over 180 minutes I don't think I saw a single Bodo player show anything resembling elite level talent. And by that I mean being a premier league quality footballer. Even AZ had a few who showed this.