In my opinion, Ten Hag would not be a good choice for Borussia Dortmund. We all see the games he played with Manchester United. I think he is very weak tactically. A team like Borussia Dortmund needs to stop using trial and error. They tried something with Nuri Şahin and failed. After a very bad season in the Bundesliga, they lost to Bologna in the Champions League. They need a more experienced, better, tactically rich coach. Maybe an option like Nagelsmann would be great for Dortmund.
I agree with you. Ten Hag has a bad reputation when he managed Man United. He often has a problem with players. It won't be a good choice for Dortmund, he may made the same mistake in Dortmund. It is better to find out another candidate for Dortmund next coach. I'm sure, the option isn't Ten Hag only. 