They are just bad, the technique is below average, the understanding of the game is below average, the set pieces are average. The players are physical I can't take that from them but they have nothing else.
In possession the players barely understand each others, the support runs are ridiculously bad, they don't offer space or viable passing options to the ball carrier. When the ball carrier is tackled the support and the cleaners take forever to arrive which creates lengthy rucks and plenty of time for the defense to organize itself. It's also not sure if the staff scripts the outing options, it doesn't look like it.
In defense it's just too bad, the rucks are rarely contested properly, the tacklers are rarely assisted, the offside line seems facultative, the forwards will often play the ball when they are offside or on the ground, the backs don't know how to play a flat or inverted defense let alone a deep one, the opposing wideouts are routinely left alone and there are big holes all across the line.
And as a side note, no one can kick the ball to save his life.