There were alot of articles about it for months in 2012 and 2013 that Chelsea wanted him and that Arsenal wanted him has even been confirmed by Fellaini himself who declared to ESPN that he didn't want to join Arsenal because he preffered a move to Manchester United. (
http://www.espn.co.uk/football/sport/story/252465.html). Don't be an idiot spouting things like could you ever imagine Wenger going fellaini, he went for him and he went for far worse players aswell in his time at Arsenal. Wenger is hardly the symbol of making smart transfer deals. if you refer to the fact Arsenal would never be looking for a physical player like Fellaini, well they signed Flamini as that type of player because they couldn't get Fellaini.
I also said none of them wanted to pay £27.5m for him while we ended up doing that because we messed up in the summer, if we wanted him we could have signed him for £7m less months before that, but we had the worst managed transfer summer in the history of transfer summers and we ended up losing out on everybody and panicked and signed Fellaini for a ridiculous fee. It is bad I agree, however doesn't mean the guy is useless and also doesn't mean no other teams were interested in him or wouldn't even go near him.
You people sorta make the connection in your head that United is doing worse now after signing Fellaini hence why Fellaini and every possible thing he does wrong or isn't ideal about him must be the cause of all the problems we are having at United right now. While actually it is the other way around and Fellaini is struggling and underperforming because he is playing football under less than ideal circumstances at a club that has like a million problems going on since SAF left. If things stabilise and he gets time and support he'll come good and he'll prove he isn't a useless player. However if you label him like that from the start and will take any stone you can throw at him, then how can he come good ?