The management has made the right decision by firing Erik Ten Hag if they continue to retain him Man United will continue their bad record this season, it was proven that after Ruud took over the position as temporary coach, he was able to provide quite good results, meaning that so far the team's fault does not lie in the condition of the players but in the coach's inability to build club, basically Erik Ten Hag is not the right coach for Man United.
They made two good decisions, sacking Ten Hag and appointing Ruud van Nistelrooy as their temporary coach. With Ruud, in latest four matches, they got 3 wins and 1 draw, that are positive results to bring good sentiment back in their club.
Another big decision is appointing the head coach position to Ruben Amorim, one of most interesting young coaches around Europe. We can not say it is a good decision or not for now, but time will help us knowing about success or failure of this decision. If Ruben Amorim can do his job successfully like Xabi Alonso in Bayer Leverkusen, it will be a very great success for Manchester United and can open a new successful era for their club too.
Ruud with his good performances as Manchester United's temporary head coach, will have better CV to join other clubs including big clubs.