Wow...Manchester United odd looks attractive and tempting. I think I have to bet on United despite their inconsistent performance. Let me try my luck because of the big odd given to them who knows if they will miraculously win City. However, BTTS is the best option for others because it's sure that both teams will score in this game.
Oh please tell me that you went with Manchester United to win the game at full time and not BTTS.

Manchester United stunned Manchester City at Old Trafford; they did it in dominating style without conceding a goal. It will be a big win for anyone who bet on them.
Of course, I bet on United to win like I said but it wasn't only that game since I was on four leg parlay and Arsenal cut my slip because of that draw. This is the reason why I don't bet on parlay that much but since I was trying something different, I had to go on a four leg parlay.
It was one of the best moments for United and for Carrick. I had the feelings that United would win City and that was I followed my instincts.
So sad ☹️, really sad to learn that you later didn't win this bet because of another team you included in the parley, I read that initially comment of yours and hoped read another announcing your big win because this would have been a very perfect one but unfortunately, you ended up losing the bet..
For games like this, what I usually do is bet on that game separately in a single bet mode before proceeding to bet on same game together with other games I want to combine together to form a parley, this strategy ensures that even is another game ended up losing causing the parley to cut, I will still win that single bet so long as the prediction was perfect 👌.