Tactics
Two things, it is easy to execute the pass to the player in offside position or at the very least much easier than normally. And secondly if the majority of play goes through one player he is bound to produce something, sooner or later. There is no question that he underperforms in my opinion, the lack of quality is very visible especially that it wasn't the case in previous seasons, I also think Rice has similar issues, but his role is slightly different, so it is easy to overlook, but IMO it is a very big problem for the team.
BTW I do not fault Ode for lack of commitment or not giving enough, he applies himself and it is very evident, but the quality of his game is very concerning.