There's a general recurring thought process that a team simply requires the correct instructions and they will perform. For instance, get Bould to run his Graham offside traps with the defence and they will eventually be able to successfully implement it.
Coaching can make a difference, but it's all about ability. Doesn't matter how much training you do, ultimately it boils down to the ability of the team. The team can't defend, because the players aren't good enough defenders?