I think Torino performance was not bad at all, yes he was not successful in Roma but the team was not a good team and he could not stay there long enough. The Premier League is a very different league, it is very difficult to be successful there anyway.
So I do not have a negative opinion as you do. I think he is a manager who can achieve success in a team with good squad quality
Torino will always be a mid-table team, if they can save themselves. i am sorry to be so harsh, but they are not a team that invests money, because maybe they don't have any for goodness sake.
Roma, on the other hand, is trying in every way to get back into the big leagues, looking for the right players and coaches.