Why is my pro clubs ai defending and passing so bad?

It's because you call for the ball double tap R1/RB when each ai gains possession and they'll make the right pass maybe even take someone on they are hesitant due to waiting for the call this negates the call. You should never call for the ball it's EA answer to a turnover due to bad programming and is there because 95% of players don't know how to move off the ball, instead of EA throwing in some tutorials to show players how and where to move they instead introduced the ping pong button.