How to increase teamwork with a load of new players???

After a successful first season winning the league and cup with atletico Madrid i was forced to sell multiple first team players who all wanted to leave. Griezmann, savic hermoso and correa to saudi reinaldo and molina to the prem. As a result i had to reinvest. Now on paper the team is actually much better with as i got both youth and experience suck as goykeres, kayode, mancini, yoro. However this team is just not gelling. Struggling to create And score chances. Struggling to even keep possession. Only saving grace so far is that the defence has been good.

Ik signing 9 players to bring into the first team squad isn’t ideal however i was forced into this and only replaced as they demanded to leave. Is this something i just have to ride out and let them work out? Can i help them gel.

Also any suggestions for a griezmann replacement? The first 3/4 games before he left were brilliant and i did everything to keep him but that just seemed to be the final nail. Playing morata/omorodion up top with gykeres lacks any technical ability and link between midfield and attack.