United finished sixth in the Premier League last season after losing 12 games, and have since seen Paul Pogba, Jesse Lingard and Juan Mata leave the club.
They have bought in the exciting Tyrell Malacia at full back, Christian Eriksen in midfield and are expected to sign Ajax centre back Lisandro Martinez, but some fans may be disappointed after missing out on players such as Darwin Nunez this summer.
Erik ten Hag is looking to transform the culture of his new club Manchester United
Speaking to the Mirror, Redknapp said United had: ‘A shortage of good players. You look at the team, it’s very ordinary. The left-back [Luke] Shaw is a good player but couldn’t get him fit last year. They just look to me like they’re all over the place.
‘They have a lack of quality in the midfield, missing that player who can really make them play. Without Ronaldo’s goals I don’t know where they would have finished. Recruitment is going to be the key, they need to get going.’
Cristiano Ronaldo scored 18 Premier League goals last season. The only other player to reach double figures at Old Trafford was Bruno Fernandes.
Harry Redknapp feels Ten Hag might feel ‘better off’ if Ronaldo was to leave the club
There have been rumours about the 37-year-old striker moving to a club that has secured Champions League football for next season, as Lionel Messi sits close behind his goal record in the competition.
Losing Ronaldo may not be the worst thing for ten Hag and United, though, as Redknapp explains: ‘Some managers don’t want big superstars. They’re much happier managing a team without the egos and Ronaldo is one of the biggest in world football.
‘Maybe he [Ten Hag] feels more comfortable without him as it’s not like he’s come from a big background. He’s come from Ajax in Holland, not really yet managed at the top level.
Ronaldo was comfortably United’s top scorer last year, picking up 18 Premier League goals
‘Now suddenly he’s going to be working with one one of the greatest ever players. Maybe he might feel I’m better off without him. He may feel ‘I can come in, get my message across, say what I want and work how I want to press. He [Ronaldo] may not fit into that.’
The former Tottenham manager continued: ‘It’s a tough situation so he will have to wait and see, but if Ronaldo does want to go you can be sure that he will.’
Redknapp added that he couldn’t see where he could go that’s ‘better than Man United’ and can’t see where he’d go for Champions League football.
Ronaldo had been linked with Chelsea and an unnamed Saudi Arabian club, but both options appear to have closed.