Losing their first two matches does not mean they will win their next match. Manchester United will be playing their next match against Copenhagen, if Manchester United is not careful, they are still going to lose the match. Manchester United's performance is poor, and I am not seeing any improvement in Manchester United. In their last two matches played in the Premier League, they struggled to win matches that they should have won comfortably, but they are always finding it difficult to win. I won't be surprised if Manchester United ends up playing a draw against Copenhagen. With Manchester United's current performance, I am not expecting much from Manchester United in the match.
I have taken Manchester United out of the picture of teams that will qualify for that group, the same way that Man Utd are hoping to win their game is the same way the opponent team Copenhagen and Galatasaray that has gotten some point, is looking forward to getting more point to qualify, thereby making it more difficult for the man United side that has not even gotten a point to think of going through the next round of the competition.
This maybe just one game too early

I am also extremely pessimistic about their prospects for the Champions League, but not only for this group stage, which is already hard enough, but also for their qualification in the Premier League for next season. But to get back to the point, if Manchester United can win this game against Copenhagen, that would still keep their head above water in the group. Galatasaray Istanbul is now playing two games against Bayern Munich and if these two games go as expected, which means two losses for Galatasaray, there would still be a final opportunity for Manchester United to finish the group in second place when they win their game in Istanbul. But I know that this will be hard for them as Galatasaray is a serious opponent in their home stadium.