Imagine that Leverksen was built by so extraordinary that it could be a strong contender in the Bundesliga so a team that looked weak in the hands of Erik ten Hag. But we cannot judge this too quickly, as Erik Ten Hag reputation at Man United continues to be linked until now. The league hasn't started yet and let's give him 1 season to make sure.
We can't judge "too" quickly, but this was literally a U20 team, so players were all under 20 years old. And more importantly, it isn't about the result, sure the result was horrible but lets assume that it's just some unimportant friendly and this could happen.
However, HOW he reacted to it is the thing that matters. His reaction shows you that he never learns from his mistakes and he is going to be a terrible manager. Because dude literally talked about how the team he took over was worse than what Xabi left, and this team is brand new and they need to start all over again and should expect bad results. Dude, you got a team that won the league and then became second, just losing one or two players, even if they are great, shouldn't take you from being second, to losing u20, he never takes blame, and always finds a "reason".