The criticism came as the Blues slumped to a 2-0 Premier League defeat to Everton at Goodison Park, despite dominating the first half.
Richarlison's header and Gylfi Sigurdsson rebound after Kepa Arrizabalaga saved his penalty secured a first victory over a top-six club for over two years.
It takes the Toffees into 11th in the table and leaves the west Londoners' to consider their seventh league defeat of the campaign.
Maurizio Sarri's side dominated the statistics, having 36 touches in their opponent's box, making 665 passes and enjoying 67 per cent possession - yet they were unable to convert their dominance.
Souness has sourced Chelsea's problems to the lack of balance in midfield, which sees Jorginho flanked by Ross Barkley and N'Golo Kante.
The trio have contributed just eight league goals between them this season - half as many as leading scorer Eden Hazard has struck in all competitions.
The Scot told Sky Sports: "You watch them in the first half, they must be wonderful in five-a-side. Look at those stats they've had two-thirds of possession, they've totally dominated things.
"They've had twice as many touches of the ball and they lose 2-0.
"If you have that much of the ball, where are you having the ball? You've having it on the half-way line in your own half. They're playing like they're a five-a-side team.
"The stats would bare our that they're a five-a-side team. You take Hazard out, where is the threat coming from?
They've got a midfield that is made up of Kante, who doesn't get goals. Jorginho, who has scored two goals, a penalty against Huddersfield and one against Fulham, and Barkley. But they don't get goals. The mix is totally wrong.
"If you insist on playing Jorginho, who is neat and tidy but has no goal threat, you must have goal threat either side of you.
"The reliance on Hazard to produce the goods week-in, week-out is too much for him. You have to share the goals around."
Following the international break, they go to relegation-threatened Cardiff City before hosting West Ham at Stamford Bridge.
Trips to title-chasing Liverpool and top four rivals United are to come in April in what is a testing run-in for the club.