United lie seventh in the table, six points outside the top four and a further eight behind leaders Arsenal.
"I'm not writing anyone off," the 72-year-old Scot told BBC Sport.
"With Jose (Mourinho) you expect (Chelsea) to win games playing ugly, but all these teams are in there. United are in behind chasing."
He added on Sky Sports: "United can do anything. They have got that great philosophy and history, they will always do well.
"I can watch the team whenever I want and I've really enjoyed it. I'm going as a supporter now and instead of suffering with the team, I'm suffering or enjoying it with the fans. I'm really enjoying watching the team play."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball