The club have signed just one player this summer - 22-year-old Tyrell Malacia from Feyenoord - with Barcelona's Frenkie de Jong reportedly hesitant about moving to the Red Devils.
And Agbonlahor says the club are a 'shambles' with Cristiano Ronaldo wanting to leave this summer, along with their lack of activity in the transfer market after a disappointing sixth-place finish last season.
The former Aston Villa striker even went as far as claiming he would rather join every other one of Man United's rivals if he was still playing.
"If I had the choice to go to Manchester City or Liverpool before Manchester United, it would be a no-brainer," Agbonlahor told talkSPORT.
"But I'd also go to Chelsea before Manchester United and I'd choose Spurs now.
"If I was a player now, and I had the choice to go to Spurs or Manchester United, I'm going to Spurs.
"I'd even go to Arsenal before Manchester United, they're a shambles.
"Ronaldo wants to leave because of it, they've got players they can't rely on, and even De Jong from Barcelona. He's like, 'I might go but I'll see how I feel. I'll let you know in a month'.
"That's what Manchester United have come to."
"It's actually embarrassing for Manchester United fans. They've become that club that players are like to their agent, 'If I can go to Spurs I'll go there but, if not, then gone then I'll go to Man United.
"I think that's what it's come to."