Of course it is not an easy task for a new manager to handle a team like AS Roma who are fighting hard to improve their performance so that they are at a better level than before, of course AS Roma wants a UCL place next season, therefore De Rossi is trying to bring AS Roma to zone even though it is a little difficult, I think if De Rossi is able to build a better squad maybe he will be extended by Roma at the end of this season because as far as I know De Rossi's contract is only until the end of the season therefore De Rossi has to make the board and supporters believe that he is not an amateur trainer.
With the current squad it is actually difficult for De Rossi to create a miracle because indeed previously the Roma management has made it clear that they do not have money to buy players except only on loan players, and that is why previously the owners of Roma did not have a good relationship with Mourinho because Mourinho continued to force the owner to improve the squad if he wanted to compete in Serie A, but luckily for Roma at this time they have De Rossi who is indeed at least able to lift Roma performance to get into the Champions League zone, I think De Rossi success in bringing Roma to European competiition will Certainly be a benchmark for the management to extend his contract next season.
The question now that de Rossi has been able to take Roma to the eurozone is, did Mourinho at Roma fail?
I Personally of course answer NO, because after all Mourinho has done a lot at the club and even if we look at the main players used by De Rossi is Currently the main line-up of Mourinho previous choice, Besides De Rossi is only given the responsibiliity of bringing the team to just Compete in the Europa League zone, while Mourinho 0bviously has a greater responsibility by having to bring Roma to compete for the Scudetto by Relying only on a makeshift squad.