~Snip
There is no doubt, Bayern Munich will finish easily as group A winners based on the results achieved in the two matches that have been played. I doubt that Manchester United can accompany Bayern Munich to the round of 16, their inconsistent performance makes their chances very slim.
Galatasaray only needs to make Bayern Munich fail to get full points when they visit their home ground, the good performance shown by Galatasaray in the domestic league must be maintained to frustrate Bayern Munich. Galatasaray's chances are better than Manchester United, your prediction is very correct based on the quality of the team and the results obtained in previous matches.
I don't think Manchester United will fail as long as they can improve their performance in the next 4 matches. It is true that Manchester United performed poorly in the first 2 matches, but they still have 4 other opportunities to try to qualify for the round of 16. The doubts don't only come from you, but the supporters also have doubts, but I think they are still worthy of hope.
In group F, Milan and Dortmund also seem to still have a chance of qualifying for the last 16. PSG and Newcastle cannot be expected to consistently win every subsequent match. So all the teams in group F still have the opportunity to win lots of points and improve their position. Every game is tough for all the teams in group F, so I'm not sure who will actually make it out of this group before they finish 5 games.