This is the popular opinion in the Caf, mostly based on what we've seen on tv.
This is the fact:
Rooney started in 40 of our 62 matches in 2015/16 season, not as much as Martial (47) and Mata (51) among the attackers. He contributed 19 goals and assists in all competition, only fewer than Martial (25) and Mata (20), and more than Lingard (13), Rashford (10), Herrera (9), Depay (7), Young (5), and Fellaini (4).
Rooney's 13 goals in that season was the lowest in his United career, certainly far from decent for a player of his stature/salary, and may rightly be called "beyond shit". However, if being the second highest goalscorer in a team that finished 5th in the league, with 5 points gap with the runner up, is to be called beyond shit, then many of his team mates should probably join him also in such honor.
And another fact is, with the addition of one of the best managers in football history, the legendary French League 1 (and one of the world's) top goalscorer of the season, the Bundesliga best player of the year, and the most expensive player on the planet, we are currently still working to surpass the achievement of that "beyond shit" team of last season. Hope that will give some perspective.