After the disappointing defeat by Brentford, Amorim said: “I am never concerned about my job – I am not that kind of guy.”
The Portuguese, 40, has been criticised for his stubbornness in sticking with his favoured 3-4-2-1 formation.
Speaking on Match of the Day, ex-Manchester City and England defender Micah Richards said those tactics could lead to “his undoing” and Premier League record goalscorer Alan Shearer said Amorim was fortunate to have avoided the sack.
“I just don’t know what’s going on,” admitted ex-Birmingham City, Derby County and Plymouth Argyle boss Rooney, 39.
“I have tried my hand in management and it didn’t work out too well, I get it. Ruben Amorim is my age, he is still a young manager and I’m sure he still has a massive future, but what’s going on at Man Utd, this is not Man Utd.
“I honestly hope he can turn it round and he does. But if you’re saying to me, ‘do you believe he will?’, then, after everything I’ve seen, honestly, I’ve got no faith in it.”
