The embarrassing part is they were defeated in front of their own fans by empoli, a team that is struggling to stay away from the relegation zone in serie a. 
I don't think Motta really has the special ability to manage a team as big as Juventus. In UCL they were eliminated and they have to suffer the same fate again in the Italian cup today, a competition that allows them to get at least one title this season because in serie a they will not get anything.
That's football because in certain conditions even top teams can be defeated by teams that are struggling to get out of the relegation zone and for me it's not something to be ashamed of because we have often seen things like this happen in competitions. Motta is indeed not very experienced in handling big teams and maybe his ability cannot be said to be perfect because in crucial conditions that occur on the field he does not know what to do.I don't think Motta really has the special ability to manage a team as big as Juventus. In UCL they were eliminated and they have to suffer the same fate again in the Italian cup today, a competition that allows them to get at least one title this season because in serie a they will not get anything.
There have been many setbacks experienced by Juventus and even long before he became a coach so blaming Motta as a whole is also not the right decision. There are many things that need to be evaluated because so far this season Juventus has lost momentum to compete with other top teams.