It is true that Manchester United always gives its coaches enough time, but I disagree with you if Manchester United's new coach fails to win 10 matches in a row, Manchester United won't sack the coach because that era is gone. If Ruben Amorim fails to win more matches for Manchester United when the international break is over, he will be at a big risk of losing his job at Manchester United.
Manchester United has been really linnet in recent times and with the case of Amorim I do no think it is time for them to take such drastic actions immediately but then I hope Amorim does not make everyone get weary of his poor results so far but then Manchester United will very much likely still give him some more time just like they did with Ten Hag, I know that Amorim is trying to get along with the team but it is actually taking too long.
Man united is not a club that quickly sack their coaches they will try to give you a full season some 2 season to see if you can bring back the name of the club to were it uses to be before, those that just started watching football in the last 10 years wouldn't know how good Man united was you will enjoy watching Man united then.
They may give Amorim this season if he can come up with better results he won last week let's still watch this week this week will be difficult since it is a Manchester Derby game though both club is not performing well this season I can't predict who will win Amorim will still be given more time if he couldn't get a point this week.
If it is club Leverkusen Amorim would be off sacked just two matches Erik ten hag played he was sacked by Leverkusen Erik ten hag is never good.