Nottingham are favourites in this match, but it is difficult to bet against Manchester United, I agree with that, even when we see that they are not doing very well. And sometimes they do have good matches, but I doubt that they can count on anything more than a draw now, and that is in the best case. And you are right that it is better to leave this match and not think about betting on it, although I have thoughts that Nottingham will be able to score and not lose this match.
Although Nottingham Forest are the favorites, they need to be careful because it is possible that Manchester United will beat them because if you look at the previous matches, Nottingham Forest lost to Bournemouth, Fulham and several other small teams.
A defeat will not change Nottingham Forest's position in the standings in third place, but this is dangerous because in the next match if they draw and lose again, Chelsea and Manchester City will benefit.
Manchester United are in a slightly better condition so letting them play openly will give unexpected results and can beat Nottingham Forest.