I think both clubs are in disarray in their own ways. Both have great managers but not idea players. United have good players on paper but who seem to have really poor attitudes and undermine the manager eventually.
Chelsea have spent a lot of money but have a completely new squad who have had little time together and are very raw.
It’s easy to say “Chelsea should because they spent 1bn”. But I am talking about their current squads, manager, board, situation etc
Chelsea will be able to sort out their team much faster than United. Chelsea’s problem is merely a matter of Boehly buying specific players to build a sound team whereas United can buy anyone and play like Lampard is in charge.