KDB and Sterling aren't playing well, no center forward available until recently (Jesus still needs match fitness)
Sterling gets very timid very quickly if he thinks the opposition fullback can cover him for pace, and he isn't as quick as he used to be. KDB is making too many mistakes and making the wrong decisions during counter attacks. Our midfield and forward lines are really static, often our best (only?) movements come from Cancelo & Walker. We're moving the ball too slowly at the back, our midfield pivots are marked out of the game, or they lack the movement to create enough space for themselves to get the ball moving forward. Our wingers/striker rarely threaten in behind the opposition defense, means they can condense the space leaving us very little room to play between the lines.
When we do have the opposition held back in their own third, we move the ball too slowly to find any space on the wings, and when we do create any 1v1 situations our wingers aren't good enough to create goal scoring opportunities
tldr; key players in poor form, static, slow passing, easily countered, no confidence & no striker options.