It would be very risky if they brought back the previous coach who was also considered a failure in handling Manchester United. If they fired Erik Ten Hag, they should bring in a coach with a younger name or who has never been associated with Manchester United. If they want to take the risk, then they can bring in a young coach to be their coach. Now I think many teams are doing that and some of them are successful. But I think management is one of the parties that must be able to introspect themselves with what they feel now. Because when they do not manage the team well, then changing the coach is not the best solution because the problem is still within the team.
In conclusion, Man United may indeed need a new coach to try to get a positive impact. But all of that must be done carefully and of course getting an experienced coach is the main target. And most importantly, Man United can get a coach who is able to manage the team very well, for example Zidane. But unfortunately that will never happen because MU management will definitely not agree to Zidane request.
It is not easy to find a new quality coach, especially for a team that has been in decline for a long time like Manchester United, of course this is not an easy job to be taken by a coach who has good quality, the stakes for a coach's career are very high
However, Manchester United has no other choice but to make a process with a new coach because Ten Hag has failed to handle Manchester United so management must think of other ways to make changes in the Manchester United team.
Changing coaches will be difficult and make everything possible for the team but maintaining Ten Hag will not change anything, so Manchester United management must make a choice whether they want to continue to slump or take other risks.