If you think because Manchester United has not lifted a league title for about a decade will make ATM win Manchester United, I think it's also not a good analysis.
In football, you cannot do without history. If you can check Manchester United vs ATM h2h better.
Then Ronaldo has an incredible individual stat against ATM and will be in Manchester United team.
Currently, Manchester United has gone 4matches unbeaten which is directly opposite to what is happening to ATM now.
So?
Surely this is not strong case with Manchester United even they have very bad time in last few years but now recently they are developing as a better team and giving some better results so just having not title in last decade, and now they can't beat Atletico Madrid is completely none logic theory they can beat any team in any match.
With current form Manchester United is very strong, and Atletico Madrid is having serious trouble with losing some good number of matches and now in form they as one of worst teams in La Liga after Real Sociedad which is also having very bad time with their form. But, the good thing is right now they have some good time for changing things in better way as UEFA Champions League is on bread which is going to end in February.