You are right, Manchester United with the nonsense they are playing has no business with the top 4 position, even an Europa League spot will still be difficult for them to achieve judging from what they are currently playing now. Frankly, Manchester United made good signings but I feel that isn't enough as the backline was almost totally neglected during the window. The like of Liverpool, Chelsea and Arsenal has already gotten the top 3 positions, it's left for City, Tottenham and the rest to fight for the remaining spot which I don't see Manchester United in it.
They're certainly not playing at their best and even with their new signings, I still don't see them finishing amongst the top 4 spot in the EPL. Finishing amongst the top 10 is more realistic with the way they're playing.
Yeah, Liverpool, Arsenal and Chelsea would likely fight for the top 3 spot as they've been in very good form lately and playing well. They've also bolstered their squad with new players. I do hope Manchester united would do away with their not so impressive performance and prove naysayers and skeptics(i included) wrong this season.